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Update matching_candidates_in_table() to treat all conditions similar

Browse Source 
Fixed also that the 'with_found_constraint parameter' to
matching_candidates_in_table() is as documented: It is now true only
if there is a reference to a previous table in the WHERE condition for
the current examined table (as it was originally documented)

Changes in test results:
- Filtered was 25% smaller for some queries (expected).
- Some join order changed (probably because the tables had very few rows).
- Some more table scans, probably because there would be fewer returned
  rows.
- Some tests exposes a bug that if there is more filtered rows, then the
  cost for table scan will be higher. This will be fixed in a later commit.
This commit is contained in:
Monty
2021-10-07 20:15:34 +03:00
committed by Sergei Petrunia
parent dc2f0d138d
commit b67144893a
41 changed files with 286 additions and 269 deletions
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16
mysql-test/main/cte_recursive.result
View File

@ -3260,10 +3260,10 @@ ORDER BY path;
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY <derived2> ALL NULL NULL NULL NULL 15 Using filesort
2 DERIVED t2 ALL NULL NULL NULL NULL 15 Using where
3 RECURSIVE UNION t2 ALL NULL NULL NULL NULL 15 Using where
3 RECURSIVE UNION <derived2> ref key0 key0 5 test.t2.id 2
4 RECURSIVE UNION t2 ALL NULL NULL NULL NULL 15 Using where
4 RECURSIVE UNION <derived2> ref key0 key0 5 test.t2.id 2
3 RECURSIVE UNION t2 ALL NULL NULL NULL NULL 15
3 RECURSIVE UNION <derived2> ALL NULL NULL NULL NULL 15 Using where; Using join buffer (flat, BNL join)
4 RECURSIVE UNION t2 ALL NULL NULL NULL NULL 15
4 RECURSIVE UNION <derived2> ALL NULL NULL NULL NULL 15 Using where; Using join buffer (flat, BNL join)
NULL UNION RESULT <union2,3,4> ALL NULL NULL NULL NULL NULL
DROP TABLE t1,t2;
set tmp_memory_table_size=default;
@ -4467,8 +4467,8 @@ NULL UNION RESULT <union4,5> ALL NULL NULL NULL NULL NULL
3 DERIVED v ALL NULL NULL NULL NULL 12 Using where
3 DERIVED h ALL NULL NULL NULL NULL 12 Using where; Using join buffer (flat, BNL join)
3 DERIVED w ALL NULL NULL NULL NULL 12 Using where; Using join buffer (incremental, BNL join)
2 RECURSIVE UNION <derived4> ALL NULL NULL NULL NULL 2
2 RECURSIVE UNION h ALL NULL NULL NULL NULL 12 Using where; Using join buffer (flat, BNL join)
2 RECURSIVE UNION h ALL NULL NULL NULL NULL 12
2 RECURSIVE UNION <derived4> ALL NULL NULL NULL NULL 2 Using where; Using join buffer (flat, BNL join)
2 RECURSIVE UNION w ALL NULL NULL NULL NULL 12 Using where; Using join buffer (incremental, BNL join)
NULL UNION RESULT <union3,2> ALL NULL NULL NULL NULL NULL
prepare stmt from "with recursive
@ -4566,8 +4566,8 @@ id select_type table type possible_keys key key_len ref rows Extra
5 RECURSIVE UNION <derived2> ALL NULL NULL NULL NULL 2
NULL UNION RESULT <union3,4,5> ALL NULL NULL NULL NULL NULL
2 DERIVED h ALL NULL NULL NULL NULL 12
2 DERIVED w ALL NULL NULL NULL NULL 12 Using join buffer (flat, BNL join)
2 DERIVED <derived3> ALL NULL NULL NULL NULL 12 Using where; Using join buffer (incremental, BNL join)
2 DERIVED <derived3> ALL NULL NULL NULL NULL 12 Using where; Using join buffer (flat, BNL join)
2 DERIVED w ALL NULL NULL NULL NULL 12 Using where; Using join buffer (incremental, BNL join)
prepare stmt from "with recursive
ancestor_couples(h_id, h_name, h_dob, h_father, h_mother,
w_id, w_name, w_dob, w_father, w_mother)

6
mysql-test/main/delete.result
View File

@ -205,13 +205,13 @@ insert into t3 values (1,1),(2,1),(1,3);
select * from t1,t2,t3 where t1.a=t2.a AND t2.b=t3.a and t1.b=t3.b;
a b a b a b
1 1 1 1 1 1
2 1 2 2 2 1
1 3 1 1 1 3
2 1 2 2 2 1
explain select * from t1,t2,t3 where t1.a=t2.a AND t2.b=t3.a and t1.b=t3.b;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ALL NULL NULL NULL NULL 3
1 SIMPLE t2 ref PRIMARY PRIMARY 4 test.t1.a 1 Using index
1 SIMPLE t3 eq_ref PRIMARY PRIMARY 8 test.t2.b,test.t1.b 1 Using index
1 SIMPLE t2 index PRIMARY PRIMARY 8 NULL 3 Using where; Using index; Using join buffer (flat, BNL join)
1 SIMPLE t3 index PRIMARY PRIMARY 8 NULL 3 Using where; Using index; Using join buffer (incremental, BNL join)
delete t2.*,t3.* from t1,t2,t3 where t1.a=t2.a AND t2.b=t3.a and t1.b=t3.b;
select * from t3;
a b

24
mysql-test/main/derived_view.result
View File

@ -2044,16 +2044,10 @@ id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t5 ALL NULL NULL NULL NULL 2
1 SIMPLE t1 ALL NULL NULL NULL NULL 3 Using join buffer (flat, BNL join)
1 SIMPLE t2 ALL NULL NULL NULL NULL 3 Using join buffer (flat, BNL join)
1 SIMPLE t3 ref e e 3 test.t2.d 1 Using index
1 SIMPLE t4 ALL NULL NULL NULL NULL 5 Using where; Using join buffer (flat, BNL join)
1 SIMPLE t3 index e e 7 NULL 8 Using where; Using index; Using join buffer (flat, BNL join)
SELECT t2.d FROM t1,t2,v3 WHERE v3.e = t2.d AND v3.i < 3;
d
w
w
w
w
w
w
d
d
d
@ -2072,6 +2066,12 @@ e
e
e
e
w
w
w
w
w
w
SET SESSION join_cache_level = @exit_join_cache_level;
SET SESSION join_buffer_size = @exit_join_buffer_size;
DROP VIEW v3;
@ -2459,6 +2459,8 @@ SELECT * FROM t1;
a
1
1
1
1
drop table t1,t2;
set optimizer_switch=@save968720_optimizer_switch;
#
@ -2595,8 +2597,8 @@ CREATE ALGORITHM=TEMPTABLE VIEW v1 AS SELECT * FROM t1;
EXPLAIN EXTENDED
SELECT v1.c1, v1.c2 FROM v1, t2 WHERE v1.c1=t2.c1 AND v1.c2=t2.c2;
id select_type table type possible_keys key key_len ref rows filtered Extra
1 PRIMARY t2 ALL NULL NULL NULL NULL 2 100.00 Using where
1 PRIMARY <derived2> ref key0 key0 5 test.t2.c2 2 100.00 Using where
1 PRIMARY t2 ALL NULL NULL NULL NULL 2 100.00
1 PRIMARY <derived2> ALL NULL NULL NULL NULL 5 75.00 Using where; Using join buffer (flat, BNL join)
2 DERIVED t1 ALL NULL NULL NULL NULL 5 100.00
Warnings:
Note 1003 /* select#1 */ select `v1`.`c1` AS `c1`,`v1`.`c2` AS `c2` from `test`.`v1` join `test`.`t2` where `v1`.`c1` = `test`.`t2`.`c1` and `v1`.`c2` = `test`.`t2`.`c2`
@ -2608,8 +2610,8 @@ EXPLAIN EXTENDED
SELECT t2.c1, t2.c2 FROM (SELECT c1 g, MAX(c2) m FROM t1 GROUP BY c1) t, t2
WHERE t.g=t2.c1 AND t.m=t2.c2;
id select_type table type possible_keys key key_len ref rows filtered Extra
1 PRIMARY t2 ALL NULL NULL NULL NULL 2 100.00 Using where
1 PRIMARY <derived2> ref key0 key0 5 test.t2.c2 2 100.00 Using where
1 PRIMARY t2 ALL NULL NULL NULL NULL 2 100.00
1 PRIMARY <derived2> ALL NULL NULL NULL NULL 5 75.00 Using where; Using join buffer (flat, BNL join)
2 DERIVED t1 ALL NULL NULL NULL NULL 5 100.00 Using temporary; Using filesort
Warnings:
Note 1003 /* select#1 */ select `test`.`t2`.`c1` AS `c1`,`test`.`t2`.`c2` AS `c2` from (/* select#2 */ select `test`.`t1`.`c1` AS `g`,max(`test`.`t1`.`c2`) AS `m` from `test`.`t1` group by `test`.`t1`.`c1`) `t` join `test`.`t2` where `t`.`g` = `test`.`t2`.`c1` and `t`.`m` = `test`.`t2`.`c2`

6
mysql-test/main/distinct.result
View File

@ -173,9 +173,9 @@ INSERT INTO t2 values (1),(2),(3);
INSERT INTO t3 VALUES (1,'1'),(2,'2'),(1,'1'),(2,'2');
explain SELECT distinct t3.a FROM t3,t2,t1 WHERE t3.a=t1.b AND t1.a=t2.a;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t2 index a a 4 NULL 5 Using index; Using temporary
1 SIMPLE t1 eq_ref PRIMARY PRIMARY 4 test.t2.a 1 Using where
1 SIMPLE t1 ALL PRIMARY NULL NULL NULL 4 Using where; Using temporary
1 SIMPLE t3 ref a a 5 test.t1.b 2 Using index
1 SIMPLE t2 index a a 4 NULL 5 Using where; Using index; Using join buffer (flat, BNL join)
SELECT distinct t3.a FROM t3,t2,t1 WHERE t3.a=t1.b AND t1.a=t2.a;
a
1
@ -523,7 +523,7 @@ EXPLAIN SELECT DISTINCT t1_1.a, t1_1.b FROM t1 t1_1, t1 t1_2
WHERE t1_1.a = t1_2.a;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1_1 ALL PRIMARY NULL NULL NULL 3 Using temporary
1 SIMPLE t1_2 eq_ref PRIMARY PRIMARY 4 test.t1_1.a 1 Using index; Distinct
1 SIMPLE t1_2 index PRIMARY PRIMARY 4 NULL 3 Using where; Using index; Using join buffer (flat, BNL join)
EXPLAIN SELECT a FROM t1 GROUP BY a;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 index NULL PRIMARY 4 NULL 3 Using index

120
mysql-test/main/greedy_optimizer.result
View File

@ -142,52 +142,52 @@ Variable_name Value
Last_query_cost 1693.637037
explain select t1.c11 from t1, t2, t3, t4, t5, t6, t7 where t1.c11 = t2.c21 and t1.c12 = t3.c31 and t1.c13 = t4.c41 and t1.c14 = t5.c51 and t1.c15 = t6.c61 and t1.c16 = t7.c71;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ALL PRIMARY NULL NULL NULL 3 Using where
1 SIMPLE t2 ALL NULL NULL NULL NULL 6
1 SIMPLE t1 ALL PRIMARY NULL NULL NULL 3 Using where; Using join buffer (flat, BNL join)
1 SIMPLE t3 eq_ref PRIMARY PRIMARY 4 test.t1.c12 1 Using index
1 SIMPLE t5 eq_ref PRIMARY PRIMARY 4 test.t1.c14 1 Using index
1 SIMPLE t7 eq_ref PRIMARY PRIMARY 4 test.t1.c16 1 Using index
1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Using join buffer (flat, BNL join)
1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer (flat, BNL join)
1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer (flat, BNL join)
show status like 'Last_query_cost';
Variable_name Value
Last_query_cost 844.037037
Last_query_cost 642.737037
explain select t1.c11 from t7, t6, t5, t4, t3, t2, t1 where t1.c11 = t2.c21 and t1.c12 = t3.c31 and t1.c13 = t4.c41 and t1.c14 = t5.c51 and t1.c15 = t6.c61 and t1.c16 = t7.c71;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ALL PRIMARY NULL NULL NULL 3 Using where
1 SIMPLE t2 ALL NULL NULL NULL NULL 6
1 SIMPLE t1 ALL PRIMARY NULL NULL NULL 3 Using where; Using join buffer (flat, BNL join)
1 SIMPLE t7 eq_ref PRIMARY PRIMARY 4 test.t1.c16 1 Using index
1 SIMPLE t5 eq_ref PRIMARY PRIMARY 4 test.t1.c14 1 Using index
1 SIMPLE t3 eq_ref PRIMARY PRIMARY 4 test.t1.c12 1 Using index
1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Using join buffer (flat, BNL join)
1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer (flat, BNL join)
1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer (flat, BNL join)
show status like 'Last_query_cost';
Variable_name Value
Last_query_cost 844.037037
Last_query_cost 642.737037
explain select t1.c11 from t1, t2, t3, t4, t5, t6, t7 where t1.c11 = t2.c21 and t1.c12 = t3.c31 and t1.c13 = t4.c41 and t1.c14 = t5.c51 and t1.c15 = t6.c61 and t1.c16 = t7.c71 and t2.c22 = t3.c32 and t2.c23 = t4.c42 and t2.c24 = t5.c52 and t2.c25 = t6.c62 and t2.c26 = t7.c72 and t3.c33 = t4.c43 and t3.c34 = t5.c53 and t3.c35 = t6.c63 and t3.c36 = t7.c73 and t4.c42 = t5.c54 and t4.c43 = t6.c64 and t4.c44 = t7.c74 and t5.c52 = t6.c65 and t5.c53 = t7.c75 and t6.c62 = t7.c76;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ALL PRIMARY NULL NULL NULL 3 Using where
1 SIMPLE t3 eq_ref PRIMARY PRIMARY 4 test.t1.c12 1
1 SIMPLE t2 ALL NULL NULL NULL NULL 6
1 SIMPLE t1 ALL PRIMARY NULL NULL NULL 3 Using where; Using join buffer (flat, BNL join)
1 SIMPLE t3 eq_ref PRIMARY PRIMARY 4 test.t1.c12 1 Using where
1 SIMPLE t5 eq_ref PRIMARY PRIMARY 4 test.t1.c14 1 Using where
1 SIMPLE t7 eq_ref PRIMARY PRIMARY 4 test.t1.c16 1 Using where
1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Using join buffer (flat, BNL join)
1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer (flat, BNL join)
1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer (flat, BNL join)
show status like 'Last_query_cost';
Variable_name Value
Last_query_cost 844.037037
Last_query_cost 642.737037
explain select t1.c11 from t7, t6, t5, t4, t3, t2, t1 where t1.c11 = t2.c21 and t1.c12 = t3.c31 and t1.c13 = t4.c41 and t1.c14 = t5.c51 and t1.c15 = t6.c61 and t1.c16 = t7.c71 and t2.c22 = t3.c32 and t2.c23 = t4.c42 and t2.c24 = t5.c52 and t2.c25 = t6.c62 and t2.c26 = t7.c72 and t3.c33 = t4.c43 and t3.c34 = t5.c53 and t3.c35 = t6.c63 and t3.c36 = t7.c73 and t4.c42 = t5.c54 and t4.c43 = t6.c64 and t4.c44 = t7.c74 and t5.c52 = t6.c65 and t5.c53 = t7.c75 and t6.c62 = t7.c76;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ALL PRIMARY NULL NULL NULL 3 Using where
1 SIMPLE t7 eq_ref PRIMARY PRIMARY 4 test.t1.c16 1
1 SIMPLE t2 ALL NULL NULL NULL NULL 6
1 SIMPLE t1 ALL PRIMARY NULL NULL NULL 3 Using where; Using join buffer (flat, BNL join)
1 SIMPLE t7 eq_ref PRIMARY PRIMARY 4 test.t1.c16 1 Using where
1 SIMPLE t5 eq_ref PRIMARY PRIMARY 4 test.t1.c14 1 Using where
1 SIMPLE t3 eq_ref PRIMARY PRIMARY 4 test.t1.c12 1 Using where
1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Using join buffer (flat, BNL join)
1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer (flat, BNL join)
1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer (flat, BNL join)
show status like 'Last_query_cost';
Variable_name Value
Last_query_cost 844.037037
Last_query_cost 642.737037
set optimizer_prune_level=0;
select @@optimizer_prune_level;
@@optimizer_prune_level
@ -454,52 +454,52 @@ Variable_name Value
Last_query_cost 1693.637037
explain select t1.c11 from t1, t2, t3, t4, t5, t6, t7 where t1.c11 = t2.c21 and t1.c12 = t3.c31 and t1.c13 = t4.c41 and t1.c14 = t5.c51 and t1.c15 = t6.c61 and t1.c16 = t7.c71;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ALL PRIMARY NULL NULL NULL 3 Using where
1 SIMPLE t2 ALL NULL NULL NULL NULL 6
1 SIMPLE t1 ALL PRIMARY NULL NULL NULL 3 Using where; Using join buffer (flat, BNL join)
1 SIMPLE t3 eq_ref PRIMARY PRIMARY 4 test.t1.c12 1 Using index
1 SIMPLE t5 eq_ref PRIMARY PRIMARY 4 test.t1.c14 1 Using index
1 SIMPLE t7 eq_ref PRIMARY PRIMARY 4 test.t1.c16 1 Using index
1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Using join buffer (flat, BNL join)
1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer (flat, BNL join)
1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer (flat, BNL join)
show status like 'Last_query_cost';
Variable_name Value
Last_query_cost 844.037037
Last_query_cost 642.737037
explain select t1.c11 from t7, t6, t5, t4, t3, t2, t1 where t1.c11 = t2.c21 and t1.c12 = t3.c31 and t1.c13 = t4.c41 and t1.c14 = t5.c51 and t1.c15 = t6.c61 and t1.c16 = t7.c71;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ALL PRIMARY NULL NULL NULL 3 Using where
1 SIMPLE t2 ALL NULL NULL NULL NULL 6
1 SIMPLE t1 ALL PRIMARY NULL NULL NULL 3 Using where; Using join buffer (flat, BNL join)
1 SIMPLE t7 eq_ref PRIMARY PRIMARY 4 test.t1.c16 1 Using index
1 SIMPLE t3 eq_ref PRIMARY PRIMARY 4 test.t1.c12 1 Using index
1 SIMPLE t5 eq_ref PRIMARY PRIMARY 4 test.t1.c14 1 Using index
1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Using join buffer (flat, BNL join)
1 SIMPLE t3 eq_ref PRIMARY PRIMARY 4 test.t1.c12 1 Using index
1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer (flat, BNL join)
1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer (flat, BNL join)
show status like 'Last_query_cost';
Variable_name Value
Last_query_cost 844.037037
Last_query_cost 642.737037
explain select t1.c11 from t1, t2, t3, t4, t5, t6, t7 where t1.c11 = t2.c21 and t1.c12 = t3.c31 and t1.c13 = t4.c41 and t1.c14 = t5.c51 and t1.c15 = t6.c61 and t1.c16 = t7.c71 and t2.c22 = t3.c32 and t2.c23 = t4.c42 and t2.c24 = t5.c52 and t2.c25 = t6.c62 and t2.c26 = t7.c72 and t3.c33 = t4.c43 and t3.c34 = t5.c53 and t3.c35 = t6.c63 and t3.c36 = t7.c73 and t4.c42 = t5.c54 and t4.c43 = t6.c64 and t4.c44 = t7.c74 and t5.c52 = t6.c65 and t5.c53 = t7.c75 and t6.c62 = t7.c76;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ALL PRIMARY NULL NULL NULL 3 Using where
1 SIMPLE t3 eq_ref PRIMARY PRIMARY 4 test.t1.c12 1
1 SIMPLE t5 eq_ref PRIMARY PRIMARY 4 test.t1.c14 1 Using where
1 SIMPLE t7 eq_ref PRIMARY PRIMARY 4 test.t1.c16 1 Using where
1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Using join buffer (flat, BNL join)
1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer (flat, BNL join)
1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer (flat, BNL join)
show status like 'Last_query_cost';
Variable_name Value
Last_query_cost 844.037037
explain select t1.c11 from t7, t6, t5, t4, t3, t2, t1 where t1.c11 = t2.c21 and t1.c12 = t3.c31 and t1.c13 = t4.c41 and t1.c14 = t5.c51 and t1.c15 = t6.c61 and t1.c16 = t7.c71 and t2.c22 = t3.c32 and t2.c23 = t4.c42 and t2.c24 = t5.c52 and t2.c25 = t6.c62 and t2.c26 = t7.c72 and t3.c33 = t4.c43 and t3.c34 = t5.c53 and t3.c35 = t6.c63 and t3.c36 = t7.c73 and t4.c42 = t5.c54 and t4.c43 = t6.c64 and t4.c44 = t7.c74 and t5.c52 = t6.c65 and t5.c53 = t7.c75 and t6.c62 = t7.c76;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ALL PRIMARY NULL NULL NULL 3 Using where
1 SIMPLE t7 eq_ref PRIMARY PRIMARY 4 test.t1.c16 1
1 SIMPLE t2 ALL NULL NULL NULL NULL 6
1 SIMPLE t1 ALL PRIMARY NULL NULL NULL 3 Using where; Using join buffer (flat, BNL join)
1 SIMPLE t3 eq_ref PRIMARY PRIMARY 4 test.t1.c12 1 Using where
1 SIMPLE t5 eq_ref PRIMARY PRIMARY 4 test.t1.c14 1 Using where
1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Using join buffer (flat, BNL join)
1 SIMPLE t7 eq_ref PRIMARY PRIMARY 4 test.t1.c16 1 Using where
1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer (flat, BNL join)
1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer (flat, BNL join)
show status like 'Last_query_cost';
Variable_name Value
Last_query_cost 844.037037
Last_query_cost 642.737037
explain select t1.c11 from t7, t6, t5, t4, t3, t2, t1 where t1.c11 = t2.c21 and t1.c12 = t3.c31 and t1.c13 = t4.c41 and t1.c14 = t5.c51 and t1.c15 = t6.c61 and t1.c16 = t7.c71 and t2.c22 = t3.c32 and t2.c23 = t4.c42 and t2.c24 = t5.c52 and t2.c25 = t6.c62 and t2.c26 = t7.c72 and t3.c33 = t4.c43 and t3.c34 = t5.c53 and t3.c35 = t6.c63 and t3.c36 = t7.c73 and t4.c42 = t5.c54 and t4.c43 = t6.c64 and t4.c44 = t7.c74 and t5.c52 = t6.c65 and t5.c53 = t7.c75 and t6.c62 = t7.c76;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t2 ALL NULL NULL NULL NULL 6
1 SIMPLE t1 ALL PRIMARY NULL NULL NULL 3 Using where; Using join buffer (flat, BNL join)
1 SIMPLE t7 eq_ref PRIMARY PRIMARY 4 test.t1.c16 1 Using where
1 SIMPLE t5 eq_ref PRIMARY PRIMARY 4 test.t1.c14 1 Using where
1 SIMPLE t3 eq_ref PRIMARY PRIMARY 4 test.t1.c12 1 Using where
1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer (flat, BNL join)
1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer (flat, BNL join)
show status like 'Last_query_cost';
Variable_name Value
Last_query_cost 642.737037
set optimizer_search_depth=1;
select @@optimizer_search_depth;
@@optimizer_search_depth
@ -606,52 +606,52 @@ Variable_name Value
Last_query_cost 1693.637037
explain select t1.c11 from t1, t2, t3, t4, t5, t6, t7 where t1.c11 = t2.c21 and t1.c12 = t3.c31 and t1.c13 = t4.c41 and t1.c14 = t5.c51 and t1.c15 = t6.c61 and t1.c16 = t7.c71;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ALL PRIMARY NULL NULL NULL 3 Using where
1 SIMPLE t2 ALL NULL NULL NULL NULL 6
1 SIMPLE t1 ALL PRIMARY NULL NULL NULL 3 Using where; Using join buffer (flat, BNL join)
1 SIMPLE t3 eq_ref PRIMARY PRIMARY 4 test.t1.c12 1 Using index
1 SIMPLE t5 eq_ref PRIMARY PRIMARY 4 test.t1.c14 1 Using index
1 SIMPLE t7 eq_ref PRIMARY PRIMARY 4 test.t1.c16 1 Using index
1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Using join buffer (flat, BNL join)
1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer (flat, BNL join)
1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer (flat, BNL join)
show status like 'Last_query_cost';
Variable_name Value
Last_query_cost 844.037037
Last_query_cost 642.737037
explain select t1.c11 from t7, t6, t5, t4, t3, t2, t1 where t1.c11 = t2.c21 and t1.c12 = t3.c31 and t1.c13 = t4.c41 and t1.c14 = t5.c51 and t1.c15 = t6.c61 and t1.c16 = t7.c71;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ALL PRIMARY NULL NULL NULL 3 Using where
1 SIMPLE t2 ALL NULL NULL NULL NULL 6
1 SIMPLE t1 ALL PRIMARY NULL NULL NULL 3 Using where; Using join buffer (flat, BNL join)
1 SIMPLE t7 eq_ref PRIMARY PRIMARY 4 test.t1.c16 1 Using index
1 SIMPLE t3 eq_ref PRIMARY PRIMARY 4 test.t1.c12 1 Using index
1 SIMPLE t5 eq_ref PRIMARY PRIMARY 4 test.t1.c14 1 Using index
1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Using join buffer (flat, BNL join)
1 SIMPLE t3 eq_ref PRIMARY PRIMARY 4 test.t1.c12 1 Using index
1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer (flat, BNL join)
1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer (flat, BNL join)
show status like 'Last_query_cost';
Variable_name Value
Last_query_cost 844.037037
Last_query_cost 642.737037
explain select t1.c11 from t1, t2, t3, t4, t5, t6, t7 where t1.c11 = t2.c21 and t1.c12 = t3.c31 and t1.c13 = t4.c41 and t1.c14 = t5.c51 and t1.c15 = t6.c61 and t1.c16 = t7.c71 and t2.c22 = t3.c32 and t2.c23 = t4.c42 and t2.c24 = t5.c52 and t2.c25 = t6.c62 and t2.c26 = t7.c72 and t3.c33 = t4.c43 and t3.c34 = t5.c53 and t3.c35 = t6.c63 and t3.c36 = t7.c73 and t4.c42 = t5.c54 and t4.c43 = t6.c64 and t4.c44 = t7.c74 and t5.c52 = t6.c65 and t5.c53 = t7.c75 and t6.c62 = t7.c76;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ALL PRIMARY NULL NULL NULL 3 Using where
1 SIMPLE t3 eq_ref PRIMARY PRIMARY 4 test.t1.c12 1
1 SIMPLE t5 eq_ref PRIMARY PRIMARY 4 test.t1.c14 1 Using where
1 SIMPLE t7 eq_ref PRIMARY PRIMARY 4 test.t1.c16 1 Using where
1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Using join buffer (flat, BNL join)
1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer (flat, BNL join)
1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer (flat, BNL join)
show status like 'Last_query_cost';
Variable_name Value
Last_query_cost 844.037037
explain select t1.c11 from t7, t6, t5, t4, t3, t2, t1 where t1.c11 = t2.c21 and t1.c12 = t3.c31 and t1.c13 = t4.c41 and t1.c14 = t5.c51 and t1.c15 = t6.c61 and t1.c16 = t7.c71 and t2.c22 = t3.c32 and t2.c23 = t4.c42 and t2.c24 = t5.c52 and t2.c25 = t6.c62 and t2.c26 = t7.c72 and t3.c33 = t4.c43 and t3.c34 = t5.c53 and t3.c35 = t6.c63 and t3.c36 = t7.c73 and t4.c42 = t5.c54 and t4.c43 = t6.c64 and t4.c44 = t7.c74 and t5.c52 = t6.c65 and t5.c53 = t7.c75 and t6.c62 = t7.c76;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ALL PRIMARY NULL NULL NULL 3 Using where
1 SIMPLE t7 eq_ref PRIMARY PRIMARY 4 test.t1.c16 1
1 SIMPLE t2 ALL NULL NULL NULL NULL 6
1 SIMPLE t1 ALL PRIMARY NULL NULL NULL 3 Using where; Using join buffer (flat, BNL join)
1 SIMPLE t3 eq_ref PRIMARY PRIMARY 4 test.t1.c12 1 Using where
1 SIMPLE t5 eq_ref PRIMARY PRIMARY 4 test.t1.c14 1 Using where
1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Using join buffer (flat, BNL join)
1 SIMPLE t7 eq_ref PRIMARY PRIMARY 4 test.t1.c16 1 Using where
1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer (flat, BNL join)
1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer (flat, BNL join)
show status like 'Last_query_cost';
Variable_name Value
Last_query_cost 844.037037
Last_query_cost 642.737037
explain select t1.c11 from t7, t6, t5, t4, t3, t2, t1 where t1.c11 = t2.c21 and t1.c12 = t3.c31 and t1.c13 = t4.c41 and t1.c14 = t5.c51 and t1.c15 = t6.c61 and t1.c16 = t7.c71 and t2.c22 = t3.c32 and t2.c23 = t4.c42 and t2.c24 = t5.c52 and t2.c25 = t6.c62 and t2.c26 = t7.c72 and t3.c33 = t4.c43 and t3.c34 = t5.c53 and t3.c35 = t6.c63 and t3.c36 = t7.c73 and t4.c42 = t5.c54 and t4.c43 = t6.c64 and t4.c44 = t7.c74 and t5.c52 = t6.c65 and t5.c53 = t7.c75 and t6.c62 = t7.c76;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t2 ALL NULL NULL NULL NULL 6
1 SIMPLE t1 ALL PRIMARY NULL NULL NULL 3 Using where; Using join buffer (flat, BNL join)
1 SIMPLE t7 eq_ref PRIMARY PRIMARY 4 test.t1.c16 1 Using where
1 SIMPLE t5 eq_ref PRIMARY PRIMARY 4 test.t1.c14 1 Using where
1 SIMPLE t3 eq_ref PRIMARY PRIMARY 4 test.t1.c12 1 Using where
1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer (flat, BNL join)
1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer (flat, BNL join)
show status like 'Last_query_cost';
Variable_name Value
Last_query_cost 642.737037
drop table t1,t2,t3,t4,t5,t6,t7;
CREATE TABLE t1 (a int, b int, d int, i int);
INSERT INTO t1 VALUES (1,1,1,1);

8
mysql-test/main/group_by.result
View File

@ -552,12 +552,12 @@ a b
3 1
explain select t1.a,t2.b from t1,t2 where t1.a=t2.a group by t1.a,t2.b;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t2 ALL a NULL NULL NULL 4 Using temporary; Using filesort
1 SIMPLE t1 ALL NULL NULL NULL NULL 6 Using where; Using join buffer (flat, BNL join)
1 SIMPLE t1 ALL NULL NULL NULL NULL 6 Using temporary; Using filesort
1 SIMPLE t2 ALL a NULL NULL NULL 4 Using where; Using join buffer (flat, BNL join)
explain select t1.a,t2.b from t1,t2 where t1.a=t2.a group by t1.a,t2.b ORDER BY NULL;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t2 ALL a NULL NULL NULL 4 Using temporary
1 SIMPLE t1 ALL NULL NULL NULL NULL 6 Using where; Using join buffer (flat, BNL join)
1 SIMPLE t1 ALL NULL NULL NULL NULL 6 Using temporary
1 SIMPLE t2 ALL a NULL NULL NULL 4 Using where; Using join buffer (flat, BNL join)
drop table t1,t2;
SET @@optimizer_use_condition_selectivity=@save_optimizer_use_condition_selectivity,@@optimizer_switch=@save_optimizer_switch;
create table t1 (a int, b int);

2
mysql-test/main/join.result
View File

@ -258,7 +258,7 @@ name varchar(255) default NULL,
PRIMARY KEY (id)
) ENGINE=MyISAM;
INSERT INTO t2 VALUES (1,'s1'),(2,'s2'),(3,'s3'),(4,'s4'),(5,'s5');
select t1.*, t2.* from t1, t2 where t2.id=t1.t2_id limit 2;
select straight_join t1.*, t2.* from t2, t1 where t2.id=t1.t2_id limit 2;
t1_id t2_id type cost_unit min_value max_value t3_id item_id id name
12 5 Percent Cost -1 0 -1 -1 5 s5
14 4 Percent Cost -1 0 -1 -1 4 s4

2
mysql-test/main/join.test
View File

@ -253,7 +253,7 @@ CREATE TABLE t2 (
PRIMARY KEY (id)
) ENGINE=MyISAM;
INSERT INTO t2 VALUES (1,'s1'),(2,'s2'),(3,'s3'),(4,'s4'),(5,'s5');
select t1.*, t2.* from t1, t2 where t2.id=t1.t2_id limit 2;
select straight_join t1.*, t2.* from t2, t1 where t2.id=t1.t2_id limit 2;
drop table t1,t2;
#

8
mysql-test/main/join_cache.result
View File

@ -3071,11 +3071,11 @@ id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t2 eq_ref PRIMARY PRIMARY 4 test.t1.metaid 1 Using join buffer (incremental, BKA join); Key-ordered Rowid-ordered scan
1 SIMPLE t7 ref PRIMARY PRIMARY 4 test.t1.metaid 1 Using index
1 SIMPLE t8 eq_ref PRIMARY PRIMARY 4 test.t7.artistid 1 Using join buffer (flat, BKA join); Key-ordered Rowid-ordered scan
1 SIMPLE t3 ref t3_metaid,t3_formatid,t3_metaidformatid t3_metaidformatid 4 test.t1.metaid 1 Using index condition; Using join buffer (incremental, BKA join); Key-ordered Rowid-ordered scan
1 SIMPLE t4 eq_ref PRIMARY,t4_formatclassid,t4_formats_idx PRIMARY 4 test.t3.formatid 1 Using where; Using join buffer (incremental, BKA join); Key-ordered Rowid-ordered scan
1 SIMPLE t9 index PRIMARY,t9_subgenreid,t9_metaid PRIMARY 8 NULL 2 Using where; Using index; Using join buffer (incremental, BNL join)
1 SIMPLE t10 eq_ref PRIMARY,t10_genreid PRIMARY 4 test.t9.subgenreid 1 Using join buffer (incremental, BKA join); Key-ordered Rowid-ordered scan
1 SIMPLE t11 eq_ref PRIMARY PRIMARY 4 test.t10.genreid 1 Using join buffer (incremental, BKA join); Key-ordered Rowid-ordered scan
1 SIMPLE t3 ref t3_metaid,t3_formatid,t3_metaidformatid t3_metaidformatid 4 test.t1.metaid 1 Using index condition; Using join buffer (incremental, BKA join); Key-ordered Rowid-ordered scan
1 SIMPLE t4 eq_ref PRIMARY,t4_formatclassid,t4_formats_idx PRIMARY 4 test.t3.formatid 1 Using where; Using join buffer (incremental, BKA join); Key-ordered Rowid-ordered scan
SELECT t1.uniquekey, t1.xml AS affiliateXml,
t8.name AS artistName, t8.artistid,
t11.name AS genreName, t11.genreid, t11.priority AS genrePriority,
@ -4507,8 +4507,8 @@ SET SESSION join_buffer_size = 256;
EXPLAIN
SELECT t1.a, t2.c FROM t1,t2 WHERE t1.a=t2.a AND t2.b=99;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t2 ALL idx NULL NULL NULL 15 Using where
1 SIMPLE t1 hash_ALL NULL #hash#$hj 5 test.t2.a 36 Using where; Using join buffer (flat, BNLH join)
1 SIMPLE t1 ALL NULL NULL NULL NULL 36
1 SIMPLE t2 ALL idx NULL NULL NULL 15 Using where; Using join buffer (flat, BNL join)
SELECT t1.a, t2.c FROM t1,t2 WHERE t1.a=t2.a AND t2.b=99;
a c
SET SESSION join_cache_level=@save_join_cache_level;

2
mysql-test/main/join_nested.result
View File

@ -1064,7 +1064,7 @@ t0.b=t1.b AND
id select_type table type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t0 ref idx_a idx_a 5 const 2 100.00
1 SIMPLE t9 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer (flat, BNL join)
1 SIMPLE t1 ALL idx_b NULL NULL NULL 7 100.00 Using where; Using join buffer (flat, BNL join)
1 SIMPLE t1 ALL idx_b NULL NULL NULL 7 75.00 Using where; Using join buffer (flat, BNL join)
1 SIMPLE t5 ALL idx_b NULL NULL NULL 7 100.00 Using where
1 SIMPLE t7 ALL NULL NULL NULL NULL 2 100.00 Using where
1 SIMPLE t6 ALL NULL NULL NULL NULL 3 100.00 Using where

10
mysql-test/main/join_nested_jcl6.result
View File

@ -1073,7 +1073,7 @@ t0.b=t1.b AND
id select_type table type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t0 ref idx_a idx_a 5 const 2 100.00
1 SIMPLE t9 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer (flat, BNL join)
1 SIMPLE t1 ALL idx_b NULL NULL NULL 7 100.00 Using where; Using join buffer (incremental, BNL join)
1 SIMPLE t1 ALL idx_b NULL NULL NULL 7 75.00 Using where; Using join buffer (incremental, BNL join)
1 SIMPLE t5 ALL idx_b NULL NULL NULL 7 100.00 Using where; Using join buffer (incremental, BNL join)
1 SIMPLE t7 hash_ALL NULL #hash#$hj 5 test.t5.b 2 100.00 Using where; Using join buffer (incremental, BNLH join)
1 SIMPLE t6 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer (incremental, BNL join)
@ -2120,9 +2120,9 @@ FROM t5 LEFT JOIN
ON (t5.b=t8.b);
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t5 ALL NULL NULL NULL NULL 2
1 SIMPLE t6 ALL NULL NULL NULL NULL 1 Using join buffer (flat, BNL join)
1 SIMPLE t8 ALL b_i NULL NULL NULL 1 Using where; Using join buffer (flat, BNL join)
1 SIMPLE t6 ALL NULL NULL NULL NULL 1 Using join buffer (incremental, BNL join)
1 SIMPLE t7 const PRIMARY PRIMARY 4 const 1 Using join buffer (incremental, BKA join); Key-ordered Rowid-ordered scan
1 SIMPLE t8 ALL b_i NULL NULL NULL 1 Using where; Using join buffer (incremental, BNL join)
SELECT t5.a,t5.b,t6.a,t6.b,t7.a,t7.b,t8.a,t8.b
FROM t5 LEFT JOIN
(t6 LEFT JOIN t7 ON t7.a=1, t8)
@ -2137,9 +2137,9 @@ FROM t5 LEFT JOIN
ON (t5.b=t8.b);
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t5 ALL NULL NULL NULL NULL 2
1 SIMPLE t6 ALL NULL NULL NULL NULL 1 Using join buffer (flat, BNL join)
1 SIMPLE t8 ALL b_i NULL NULL NULL 1 Using where; Using join buffer (flat, BNL join)
1 SIMPLE t6 ALL NULL NULL NULL NULL 1 Using join buffer (incremental, BNL join)
1 SIMPLE t7 ref b_i b_i 5 const 1 Using join buffer (incremental, BKA join); Key-ordered Rowid-ordered scan
1 SIMPLE t8 ALL b_i NULL NULL NULL 1 Using where; Using join buffer (incremental, BNL join)
SELECT t5.a,t5.b,t6.a,t6.b,t7.a,t7.b,t8.a,t8.b
FROM t5 LEFT JOIN
(t6 LEFT JOIN t7 ON t7.b=2, t8)

6
mysql-test/main/limit_rows_examined.result
View File

@ -49,11 +49,10 @@ explain
select * from t1i, t2i where c1 = c2 LIMIT ROWS EXAMINED 6;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1i index PRIMARY PRIMARY 2 NULL 4 Using index
1 SIMPLE t2i eq_ref PRIMARY PRIMARY 2 test.t1i.c1 1 Using index
1 SIMPLE t2i index PRIMARY PRIMARY 2 NULL 4 Using where; Using index; Using join buffer (flat, BNL join)
select * from t1i, t2i where c1 = c2 LIMIT ROWS EXAMINED 6;
c1 c2
bb bb
cc cc
Warnings:
Warning 1931 Query execution was interrupted. The query examined at least 7 rows, which exceeds LIMIT ROWS EXAMINED (6). The query result may be incomplete
set @@join_cache_level=6;
@ -70,11 +69,10 @@ explain
select * from t1i, t2i where c1 = c2 LIMIT ROWS EXAMINED 6;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1i index PRIMARY PRIMARY 2 NULL 4 Using index
1 SIMPLE t2i eq_ref PRIMARY PRIMARY 2 test.t1i.c1 1 Using index
1 SIMPLE t2i index PRIMARY PRIMARY 2 NULL 4 Using where; Using index; Using join buffer (flat, BNL join)
select * from t1i, t2i where c1 = c2 LIMIT ROWS EXAMINED 6;
c1 c2
bb bb
cc cc
Warnings:
Warning 1931 Query execution was interrupted. The query examined at least 7 rows, which exceeds LIMIT ROWS EXAMINED (6). The query result may be incomplete
Mix LIMIT ROWS EXAMINED with LIMIT

4
mysql-test/main/multi_update.result
View File

@ -1092,8 +1092,8 @@ a b c a b c
set optimizer_switch='firstmatch=off';
explain update t1, t2 set t2.c=1 where t1.a=t2.a and t1.b in (select b from t3 where t3.c< t2.c) order by t2.c, t1.c limit 10;
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t2 ALL NULL NULL NULL NULL 10 Using where; Using temporary; Using filesort
1 PRIMARY t1 ref a a 5 test.t2.a 1
1 PRIMARY t2 ALL NULL NULL NULL NULL 10 Using temporary; Using filesort
1 PRIMARY t1 ALL a NULL NULL NULL 10 Using where
1 PRIMARY t3 ALL NULL NULL NULL NULL 10 Using where; Start temporary; End temporary
update t1, t2 set t2.c=1 where t1.a=t2.a and t1.b in (select b from t3 where t3.c<=t2.c) order by t2.c, t1.c limit 5;
select * from t2;

22
mysql-test/main/myisam_explain_non_select_all.result
View File

@ -932,15 +932,15 @@ Warning 1287 '<select expression> INTO <destination>;' is deprecated and will be
EXPLAIN DELETE t1,t2,t3 FROM t1,t2,t3 WHERE a1=a2 AND b2=a3 AND b1=b3;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ALL NULL NULL NULL NULL 3
1 SIMPLE t2 ref PRIMARY PRIMARY 4 test.t1.a1 1
1 SIMPLE t3 eq_ref PRIMARY PRIMARY 8 test.t2.b2,test.t1.b1 1
1 SIMPLE t2 ALL PRIMARY NULL NULL NULL 3 Using where
1 SIMPLE t3 ALL PRIMARY NULL NULL NULL 3 Using where
FLUSH STATUS;
FLUSH TABLES;
EXPLAIN EXTENDED DELETE t1,t2,t3 FROM t1,t2,t3 WHERE a1=a2 AND b2=a3 AND b1=b3;
id select_type table type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t1 ALL NULL NULL NULL NULL 3 100.00
1 SIMPLE t2 ref PRIMARY PRIMARY 4 test.t1.a1 1 100.00
1 SIMPLE t3 eq_ref PRIMARY PRIMARY 8 test.t2.b2,test.t1.b1 1 100.00
1 SIMPLE t2 ALL PRIMARY NULL NULL NULL 3 75.00 Using where
1 SIMPLE t3 ALL PRIMARY NULL NULL NULL 3 75.00 Using where
# Status of EXPLAIN EXTENDED query
Variable_name Value
Handler_read_key 13
@ -949,8 +949,8 @@ FLUSH TABLES;
EXPLAIN EXTENDED SELECT * FROM t1,t2,t3 WHERE a1=a2 AND b2=a3 AND b1=b3;
id select_type table type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t1 ALL NULL NULL NULL NULL 3 100.00
1 SIMPLE t2 ref PRIMARY PRIMARY 4 test.t1.a1 1 100.00 Using index
1 SIMPLE t3 eq_ref PRIMARY PRIMARY 8 test.t2.b2,test.t1.b1 1 100.00 Using index
1 SIMPLE t2 index PRIMARY PRIMARY 8 NULL 3 75.00 Using where; Using index; Using join buffer (flat, BNL join)
1 SIMPLE t3 index PRIMARY PRIMARY 8 NULL 3 75.00 Using where; Using index; Using join buffer (incremental, BNL join)
Warnings:
Note 1003 select `test`.`t1`.`a1` AS `a1`,`test`.`t1`.`b1` AS `b1`,`test`.`t2`.`a2` AS `a2`,`test`.`t2`.`b2` AS `b2`,`test`.`t3`.`a3` AS `a3`,`test`.`t3`.`b3` AS `b3` from `test`.`t1` join `test`.`t2` join `test`.`t3` where `test`.`t2`.`a2` = `test`.`t1`.`a1` and `test`.`t3`.`a3` = `test`.`t2`.`b2` and `test`.`t3`.`b3` = `test`.`t1`.`b1`
# Status of EXPLAIN EXTENDED "equivalent" SELECT query execution
@ -960,16 +960,16 @@ Warnings:
Warning 1287 '<select expression> INTO <destination>;' is deprecated and will be removed in a future release. Please use 'SELECT <select list> INTO <destination> FROM...' instead
# Status of "equivalent" SELECT query execution:
Variable_name Value
Handler_read_key 19
Handler_read_next 3
Handler_read_first 2
Handler_read_key 13
Handler_read_next 6
Handler_read_rnd_next 4
# Status of testing query execution:
Variable_name Value
Handler_delete 8
Handler_read_key 19
Handler_read_next 3
Handler_read_key 13
Handler_read_rnd 5
Handler_read_rnd_next 4
Handler_read_rnd_next 28
DROP TABLE t1, t2, t3;
#20

40
mysql-test/main/opt_trace.result
View File

@ -1114,8 +1114,8 @@ explain select * from t1,t2 where t1.a=t2.b+2 and t2.a= t1.b {
},
{
"access_type": "scan",
"resulting_rows": 100,
"cost": 2.317382812,
"resulting_rows": 75,
"cost": 7.317382812,
"chosen": false
}
],
@ -1162,8 +1162,8 @@ explain select * from t1,t2 where t1.a=t2.b+2 and t2.a= t1.b {
},
{
"access_type": "scan",
"resulting_rows": 100,
"cost": 2.317382812,
"resulting_rows": 75,
"cost": 7.317382812,
"chosen": false
}
],
@ -2688,8 +2688,8 @@ explain select * from t1 left join t2 on t2.a=t1.a {
},
{
"access_type": "scan",
"resulting_rows": 2,
"cost": 8.017578125,
"resulting_rows": 1.5,
"cost": 8.417578125,
"chosen": false
}
],
@ -9493,8 +9493,8 @@ JSON_DETAILED(JSON_EXTRACT(trace, '$**.considered_execution_plans'))
},
{
"access_type": "scan",
"resulting_rows": 800,
"cost": 44.19726562,
"resulting_rows": 600,
"cost": 84.19726562,
"chosen": false
}
],
@ -9722,8 +9722,8 @@ JSON_DETAILED(JSON_EXTRACT(trace, '$**.considered_execution_plans'))
},
{
"access_type": "scan",
"resulting_rows": 100,
"cost": 2.219726562,
"resulting_rows": 75,
"cost": 7.219726562,
"chosen": false
}
],
@ -9779,16 +9779,16 @@ JSON_DETAILED(JSON_EXTRACT(trace, '$**.considered_execution_plans'))
},
{
"access_type": "scan",
"resulting_rows": 10,
"cost": 2.021972656,
"resulting_rows": 7.5,
"cost": 2.521972656,
"chosen": true
}
],
"chosen_access_method":
{
"type": "scan",
"records": 10,
"cost": 2.021972656,
"records": 7.5,
"cost": 2.521972656,
"uses_join_buffering": true
}
}
@ -9799,10 +9799,10 @@ JSON_DETAILED(JSON_EXTRACT(trace, '$**.considered_execution_plans'))
"plan_prefix":
["t2"],
"table": "t1",
"rows_for_plan": 1000,
"cost_for_plan": 224.2416992,
"rows_for_plan": 750,
"cost_for_plan": 174.7416992,
"pruned_by_cost": true,
"current_cost": 224.2416992,
"current_cost": 174.7416992,
"best_cost": 36.0278306
}
]
@ -10193,9 +10193,9 @@ create table t3 (a int, b int, c int);
insert into t3 values (0,0,0),(1,1,1),(2,2,2),(3,3,3),(4,4,4);
explain select * from t2,t1,t3 where t2.b= t1.b and t1.a=t3.a;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t2 ALL NULL NULL NULL NULL 2 Using where
1 SIMPLE t3 ALL NULL NULL NULL NULL 5 Using where; Using join buffer (flat, BNL join)
1 SIMPLE t1 ref PRIMARY PRIMARY 8 test.t3.a,test.t2.b 1 Using index
1 SIMPLE t2 ALL NULL NULL NULL NULL 2
1 SIMPLE t1 index PRIMARY PRIMARY 12 NULL 5 Using where; Using index; Using join buffer (flat, BNL join)
1 SIMPLE t3 ALL NULL NULL NULL NULL 5 Using where; Using join buffer (incremental, BNL join)
set @trace=(select trace from information_schema.optimizer_trace);
set @path= (select json_search(@trace, 'one', 'no predicate for first keypart'));
set @sub_path= substr(@path, 2, locate('.best_access_path', @path)-2);

25
mysql-test/main/rowid_filter.result
View File

@ -2257,8 +2257,8 @@ pk1 a1 b1 pk2 a2 b2
EXPLAIN EXTENDED SELECT * FROM t1 INNER JOIN t2 ON ( pk1+1 = pk2+2 AND a1 = a2 )
WHERE b1 <= ( SELECT MAX(b2) FROM t2 WHERE pk2 <= 1 );
id select_type table type possible_keys key key_len ref rows filtered Extra
1 PRIMARY t2 ALL NULL NULL NULL NULL 101 100.00 Using where
1 PRIMARY t1 ref a1,b1 a1 5 test.t2.a2 36 28.75 Using where
1 PRIMARY t2 ALL NULL NULL NULL NULL 101 100.00
1 PRIMARY t1 ALL a1,b1 NULL NULL NULL 400 21.56 Using where; Using join buffer (flat, BNL join)
2 SUBQUERY t2 range PRIMARY PRIMARY 4 NULL 1 100.00 Using index condition
Warnings:
Note 1003 /* select#1 */ select `test`.`t1`.`pk1` AS `pk1`,`test`.`t1`.`a1` AS `a1`,`test`.`t1`.`b1` AS `b1`,`test`.`t2`.`pk2` AS `pk2`,`test`.`t2`.`a2` AS `a2`,`test`.`t2`.`b2` AS `b2` from `test`.`t1` join `test`.`t2` where `test`.`t1`.`a1` = `test`.`t2`.`a2` and `test`.`t1`.`b1` <= (/* select#2 */ select max(`test`.`t2`.`b2`) from `test`.`t2` where `test`.`t2`.`pk2` <= 1) and `test`.`t1`.`pk1` + 1 = `test`.`t2`.`pk2` + 2
@ -2274,22 +2274,23 @@ EXPLAIN
"table_name": "t2",
"access_type": "ALL",
"rows": 101,
"filtered": 100,
"attached_condition": "t2.a2 is not null"
"filtered": 100
}
},
{
"block-nl-join": {
"table": {
"table_name": "t1",
"access_type": "ref",
"access_type": "ALL",
"possible_keys": ["a1", "b1"],
"key": "a1",
"key_length": "5",
"used_key_parts": ["a1"],
"ref": ["test.t2.a2"],
"rows": 36,
"filtered": 28.75,
"attached_condition": "t1.b1 <= (subquery#2) and t1.pk1 + 1 = t2.pk2 + 2"
"rows": 400,
"filtered": 21.5625,
"attached_condition": "t1.b1 <= (subquery#2)"
},
"buffer_type": "flat",
"buffer_size": "1Kb",
"join_type": "BNL",
"attached_condition": "t1.a1 = t2.a2 and t1.pk1 + 1 = t2.pk2 + 2"
}
}
],

25
mysql-test/main/rowid_filter_innodb.result
View File

@ -2247,8 +2247,8 @@ pk1 a1 b1 pk2 a2 b2
EXPLAIN EXTENDED SELECT * FROM t1 INNER JOIN t2 ON ( pk1+1 = pk2+2 AND a1 = a2 )
WHERE b1 <= ( SELECT MAX(b2) FROM t2 WHERE pk2 <= 1 );
id select_type table type possible_keys key key_len ref rows filtered Extra
1 PRIMARY t2 ALL NULL NULL NULL NULL 101 100.00 Using where
1 PRIMARY t1 ref a1,b1 a1 5 test.t2.a2 36 28.75 Using where
1 PRIMARY t2 ALL NULL NULL NULL NULL 101 100.00
1 PRIMARY t1 ALL a1,b1 NULL NULL NULL 400 21.56 Using where; Using join buffer (flat, BNL join)
2 SUBQUERY t2 range PRIMARY PRIMARY 4 NULL 1 100.00 Using index condition
Warnings:
Note 1003 /* select#1 */ select `test`.`t1`.`pk1` AS `pk1`,`test`.`t1`.`a1` AS `a1`,`test`.`t1`.`b1` AS `b1`,`test`.`t2`.`pk2` AS `pk2`,`test`.`t2`.`a2` AS `a2`,`test`.`t2`.`b2` AS `b2` from `test`.`t1` join `test`.`t2` where `test`.`t1`.`a1` = `test`.`t2`.`a2` and `test`.`t1`.`b1` <= (/* select#2 */ select max(`test`.`t2`.`b2`) from `test`.`t2` where `test`.`t2`.`pk2` <= 1) and `test`.`t1`.`pk1` + 1 = `test`.`t2`.`pk2` + 2
@ -2264,22 +2264,23 @@ EXPLAIN
"table_name": "t2",
"access_type": "ALL",
"rows": 101,
"filtered": 100,
"attached_condition": "t2.a2 is not null"
"filtered": 100
}
},
{
"block-nl-join": {
"table": {
"table_name": "t1",
"access_type": "ref",
"access_type": "ALL",
"possible_keys": ["a1", "b1"],
"key": "a1",
"key_length": "5",
"used_key_parts": ["a1"],
"ref": ["test.t2.a2"],
"rows": 36,
"filtered": 28.75,
"attached_condition": "t1.b1 <= (subquery#2) and t1.pk1 + 1 = t2.pk2 + 2"
"rows": 400,
"filtered": 21.5625,
"attached_condition": "t1.b1 <= (subquery#2)"
},
"buffer_type": "flat",
"buffer_size": "1Kb",
"join_type": "BNL",
"attached_condition": "t1.a1 = t2.a2 and t1.pk1 + 1 = t2.pk2 + 2"
}
}
],

2
mysql-test/main/select.result
View File

@ -3480,7 +3480,7 @@ EXPLAIN
SELECT a, c, d, f FROM t1,t2 WHERE a=c AND b BETWEEN 4 AND 6 AND a > 0;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 range PRIMARY,b b 5 NULL 3 Using index condition; Using where
1 SIMPLE t2 ref c c 5 test.t1.a 2
1 SIMPLE t2 ALL c NULL NULL NULL 18 Using where; Using join buffer (flat, BNL join)
DROP TABLE t1, t2;
create table t1 (
a int unsigned not null auto_increment primary key,

2
mysql-test/main/select_jcl6.result
View File

@ -3491,7 +3491,7 @@ EXPLAIN
SELECT a, c, d, f FROM t1,t2 WHERE a=c AND b BETWEEN 4 AND 6 AND a > 0;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 range PRIMARY,b b 5 NULL 3 Using index condition; Using where; Rowid-ordered scan
1 SIMPLE t2 ref c c 5 test.t1.a 2 Using join buffer (flat, BKA join); Key-ordered Rowid-ordered scan
1 SIMPLE t2 ALL c NULL NULL NULL 18 Using where; Using join buffer (flat, BNL join)
DROP TABLE t1, t2;
create table t1 (
a int unsigned not null auto_increment primary key,

2
mysql-test/main/select_pkeycache.result
View File

@ -3480,7 +3480,7 @@ EXPLAIN
SELECT a, c, d, f FROM t1,t2 WHERE a=c AND b BETWEEN 4 AND 6 AND a > 0;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 range PRIMARY,b b 5 NULL 3 Using index condition; Using where
1 SIMPLE t2 ref c c 5 test.t1.a 2
1 SIMPLE t2 ALL c NULL NULL NULL 18 Using where; Using join buffer (flat, BNL join)
DROP TABLE t1, t2;
create table t1 (
a int unsigned not null auto_increment primary key,

8
mysql-test/main/selectivity.result
View File

@ -114,17 +114,17 @@ order by
s_acctbal desc, n_name, s_name, p_partkey;
id select_type table type possible_keys key key_len ref rows filtered Extra
1 PRIMARY region ALL PRIMARY NULL NULL NULL 5 20.00 Using where; Using temporary; Using filesort
1 PRIMARY nation ref PRIMARY,i_n_regionkey i_n_regionkey 5 dbt3_s001.region.r_regionkey 5 100.00
1 PRIMARY supplier ref PRIMARY,i_s_nationkey i_s_nationkey 5 dbt3_s001.nation.n_nationkey 1 100.00
1 PRIMARY part ALL PRIMARY NULL NULL NULL 200 2.08 Using where; Using join buffer (flat, BNL join)
1 PRIMARY partsupp eq_ref PRIMARY,i_ps_partkey,i_ps_suppkey PRIMARY 8 dbt3_s001.part.p_partkey,dbt3_s001.supplier.s_suppkey 1 100.00 Using where
1 PRIMARY partsupp ref PRIMARY,i_ps_partkey,i_ps_suppkey i_ps_partkey 4 dbt3_s001.part.p_partkey 3 100.00 Using where
1 PRIMARY supplier eq_ref PRIMARY,i_s_nationkey PRIMARY 4 dbt3_s001.partsupp.ps_suppkey 1 100.00 Using where
1 PRIMARY nation eq_ref PRIMARY,i_n_regionkey PRIMARY 4 dbt3_s001.supplier.s_nationkey 1 100.00 Using where
2 DEPENDENT SUBQUERY region ALL PRIMARY NULL NULL NULL 5 20.00 Using where
2 DEPENDENT SUBQUERY partsupp ref PRIMARY,i_ps_partkey,i_ps_suppkey i_ps_partkey 4 dbt3_s001.part.p_partkey 3 100.00
2 DEPENDENT SUBQUERY supplier eq_ref PRIMARY,i_s_nationkey PRIMARY 4 dbt3_s001.partsupp.ps_suppkey 1 100.00 Using where
2 DEPENDENT SUBQUERY nation eq_ref PRIMARY,i_n_regionkey PRIMARY 4 dbt3_s001.supplier.s_nationkey 1 100.00 Using where
Warnings:
Note 1276 Field or reference 'dbt3_s001.part.p_partkey' of SELECT #2 was resolved in SELECT #1
Note 1003 /* select#1 */ select `dbt3_s001`.`supplier`.`s_acctbal` AS `s_acctbal`,`dbt3_s001`.`supplier`.`s_name` AS `s_name`,`dbt3_s001`.`nation`.`n_name` AS `n_name`,`dbt3_s001`.`part`.`p_partkey` AS `p_partkey`,`dbt3_s001`.`part`.`p_mfgr` AS `p_mfgr`,`dbt3_s001`.`supplier`.`s_address` AS `s_address`,`dbt3_s001`.`supplier`.`s_phone` AS `s_phone`,`dbt3_s001`.`supplier`.`s_comment` AS `s_comment` from `dbt3_s001`.`part` join `dbt3_s001`.`supplier` join `dbt3_s001`.`partsupp` join `dbt3_s001`.`nation` join `dbt3_s001`.`region` where `dbt3_s001`.`partsupp`.`ps_partkey` = `dbt3_s001`.`part`.`p_partkey` and `dbt3_s001`.`partsupp`.`ps_suppkey` = `dbt3_s001`.`supplier`.`s_suppkey` and `dbt3_s001`.`part`.`p_size` = 9 and `dbt3_s001`.`supplier`.`s_nationkey` = `dbt3_s001`.`nation`.`n_nationkey` and `dbt3_s001`.`nation`.`n_regionkey` = `dbt3_s001`.`region`.`r_regionkey` and `dbt3_s001`.`region`.`r_name` = 'ASIA' and `dbt3_s001`.`part`.`p_type` like '%TIN' and `dbt3_s001`.`partsupp`.`ps_supplycost` = <expr_cache><`dbt3_s001`.`part`.`p_partkey`>((/* select#2 */ select min(`dbt3_s001`.`partsupp`.`ps_supplycost`) from `dbt3_s001`.`partsupp` join `dbt3_s001`.`supplier` join `dbt3_s001`.`nation` join `dbt3_s001`.`region` where `dbt3_s001`.`supplier`.`s_suppkey` = `dbt3_s001`.`partsupp`.`ps_suppkey` and `dbt3_s001`.`nation`.`n_nationkey` = `dbt3_s001`.`supplier`.`s_nationkey` and `dbt3_s001`.`nation`.`n_regionkey` = `dbt3_s001`.`region`.`r_regionkey` and `dbt3_s001`.`region`.`r_name` = 'ASIA' and `dbt3_s001`.`part`.`p_partkey` = `dbt3_s001`.`partsupp`.`ps_partkey`)) order by `dbt3_s001`.`supplier`.`s_acctbal` desc,`dbt3_s001`.`nation`.`n_name`,`dbt3_s001`.`supplier`.`s_name`,`dbt3_s001`.`part`.`p_partkey`
Note 1003 /* select#1 */ select `dbt3_s001`.`supplier`.`s_acctbal` AS `s_acctbal`,`dbt3_s001`.`supplier`.`s_name` AS `s_name`,`dbt3_s001`.`nation`.`n_name` AS `n_name`,`dbt3_s001`.`part`.`p_partkey` AS `p_partkey`,`dbt3_s001`.`part`.`p_mfgr` AS `p_mfgr`,`dbt3_s001`.`supplier`.`s_address` AS `s_address`,`dbt3_s001`.`supplier`.`s_phone` AS `s_phone`,`dbt3_s001`.`supplier`.`s_comment` AS `s_comment` from `dbt3_s001`.`part` join `dbt3_s001`.`supplier` join `dbt3_s001`.`partsupp` join `dbt3_s001`.`nation` join `dbt3_s001`.`region` where `dbt3_s001`.`partsupp`.`ps_partkey` = `dbt3_s001`.`part`.`p_partkey` and `dbt3_s001`.`supplier`.`s_suppkey` = `dbt3_s001`.`partsupp`.`ps_suppkey` and `dbt3_s001`.`part`.`p_size` = 9 and `dbt3_s001`.`nation`.`n_nationkey` = `dbt3_s001`.`supplier`.`s_nationkey` and `dbt3_s001`.`nation`.`n_regionkey` = `dbt3_s001`.`region`.`r_regionkey` and `dbt3_s001`.`region`.`r_name` = 'ASIA' and `dbt3_s001`.`part`.`p_type` like '%TIN' and `dbt3_s001`.`partsupp`.`ps_supplycost` = <expr_cache><`dbt3_s001`.`part`.`p_partkey`>((/* select#2 */ select min(`dbt3_s001`.`partsupp`.`ps_supplycost`) from `dbt3_s001`.`partsupp` join `dbt3_s001`.`supplier` join `dbt3_s001`.`nation` join `dbt3_s001`.`region` where `dbt3_s001`.`supplier`.`s_suppkey` = `dbt3_s001`.`partsupp`.`ps_suppkey` and `dbt3_s001`.`nation`.`n_nationkey` = `dbt3_s001`.`supplier`.`s_nationkey` and `dbt3_s001`.`nation`.`n_regionkey` = `dbt3_s001`.`region`.`r_regionkey` and `dbt3_s001`.`region`.`r_name` = 'ASIA' and `dbt3_s001`.`part`.`p_partkey` = `dbt3_s001`.`partsupp`.`ps_partkey`)) order by `dbt3_s001`.`supplier`.`s_acctbal` desc,`dbt3_s001`.`nation`.`n_name`,`dbt3_s001`.`supplier`.`s_name`,`dbt3_s001`.`part`.`p_partkey`
=== Q15 ===
create view revenue0 (supplier_no, total_revenue) as
select l_suppkey, sum(l_extendedprice * (1 - l_discount))

8
mysql-test/main/stat_tables.result
View File

@ -71,10 +71,10 @@ order by revenue desc;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE region ALL PRIMARY NULL NULL NULL 5 Using where; Using temporary; Using filesort
1 SIMPLE nation ref PRIMARY,i_n_regionkey i_n_regionkey 5 dbt3_s001.region.r_regionkey 5
1 SIMPLE supplier ref PRIMARY,i_s_nationkey i_s_nationkey 5 dbt3_s001.nation.n_nationkey 1
1 SIMPLE customer ref PRIMARY,i_c_nationkey i_c_nationkey 5 dbt3_s001.nation.n_nationkey 6
1 SIMPLE orders ref|filter PRIMARY,i_o_orderdate,i_o_custkey i_o_custkey|i_o_orderdate 5|4 dbt3_s001.customer.c_custkey 15 (12%) Using where; Using rowid filter
1 SIMPLE lineitem ref PRIMARY,i_l_suppkey,i_l_orderkey,i_l_orderkey_quantity i_l_orderkey 4 dbt3_s001.orders.o_orderkey 4 Using where
1 SIMPLE supplier eq_ref PRIMARY,i_s_nationkey PRIMARY 4 dbt3_s001.lineitem.l_suppkey 1 Using where
select n_name, sum(l_extendedprice * (1 - l_discount)) as revenue
from customer, orders, lineitem, supplier, nation, region
where c_custkey = o_custkey and l_orderkey = o_orderkey
@ -85,7 +85,7 @@ and r_name = 'AMERICA' and o_orderdate >= date '1995-01-01'
group by n_name
order by revenue desc;
n_name revenue
PERU 321915.87150000007
PERU 321915.8715
ARGENTINA 69817.1451
set optimizer_switch=@save_optimizer_switch;
delete from mysql.index_stats;
@ -178,10 +178,10 @@ order by revenue desc;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE region ALL PRIMARY NULL NULL NULL 5 Using where; Using temporary; Using filesort
1 SIMPLE nation ref PRIMARY,i_n_regionkey i_n_regionkey 5 dbt3_s001.region.r_regionkey 5
1 SIMPLE supplier ref PRIMARY,i_s_nationkey i_s_nationkey 5 dbt3_s001.nation.n_nationkey 1
1 SIMPLE customer ref PRIMARY,i_c_nationkey i_c_nationkey 5 dbt3_s001.nation.n_nationkey 6
1 SIMPLE orders ref|filter PRIMARY,i_o_orderdate,i_o_custkey i_o_custkey|i_o_orderdate 5|4 dbt3_s001.customer.c_custkey 15 (12%) Using where; Using rowid filter
1 SIMPLE lineitem ref PRIMARY,i_l_suppkey,i_l_orderkey,i_l_orderkey_quantity i_l_orderkey 4 dbt3_s001.orders.o_orderkey 4 Using where
1 SIMPLE supplier eq_ref PRIMARY,i_s_nationkey PRIMARY 4 dbt3_s001.lineitem.l_suppkey 1 Using where
select n_name, sum(l_extendedprice * (1 - l_discount)) as revenue
from customer, orders, lineitem, supplier, nation, region
where c_custkey = o_custkey and l_orderkey = o_orderkey
@ -192,7 +192,7 @@ and r_name = 'AMERICA' and o_orderdate >= date '1995-01-01'
group by n_name
order by revenue desc;
n_name revenue
PERU 321915.87150000007
PERU 321915.8715
ARGENTINA 69817.1451
set optimizer_switch=@save_optimizer_switch;
EXPLAIN select o_year,

14
mysql-test/main/subselect.result
View File

@ -345,7 +345,7 @@ patient_uq clinic_uq
explain extended select * from t6 where exists (select * from t7 where uq = clinic_uq);
id select_type table type possible_keys key key_len ref rows filtered Extra
1 PRIMARY t7 index PRIMARY PRIMARY 4 NULL 2 100.00 Using index
1 PRIMARY t6 ALL i1 NULL NULL NULL 4 100.00 Using where; Using join buffer (flat, BNL join)
1 PRIMARY t6 ALL i1 NULL NULL NULL 4 75.00 Using where; Using join buffer (flat, BNL join)
Warnings:
Note 1276 Field or reference 'test.t6.clinic_uq' of SELECT #2 was resolved in SELECT #1
Note 1003 select `test`.`t6`.`patient_uq` AS `patient_uq`,`test`.`t6`.`clinic_uq` AS `clinic_uq` from `test`.`t7` join `test`.`t6` where `test`.`t6`.`clinic_uq` = `test`.`t7`.`uq`
@ -1440,7 +1440,7 @@ a
explain extended select * from t2 where t2.a in (select a from t1);
id select_type table type possible_keys key key_len ref rows filtered Extra
1 PRIMARY t2 index PRIMARY PRIMARY 4 NULL 4 100.00 Using index
1 PRIMARY t1 eq_ref PRIMARY PRIMARY 4 test.t2.a 1 100.00 Using index
1 PRIMARY t1 index PRIMARY PRIMARY 4 NULL 4 75.00 Using where; Using index; Using join buffer (flat, BNL join)
Warnings:
Note 1003 select `test`.`t2`.`a` AS `a` from `test`.`t1` join `test`.`t2` where `test`.`t1`.`a` = `test`.`t2`.`a`
select * from t2 where t2.a in (select a from t1 where t1.b <> 30);
@ -1450,7 +1450,7 @@ a
explain extended select * from t2 where t2.a in (select a from t1 where t1.b <> 30);
id select_type table type possible_keys key key_len ref rows filtered Extra
1 PRIMARY t2 index PRIMARY PRIMARY 4 NULL 4 100.00 Using index
1 PRIMARY t1 eq_ref PRIMARY PRIMARY 4 test.t2.a 1 100.00 Using where
1 PRIMARY t1 ALL PRIMARY NULL NULL NULL 4 75.00 Using where; Using join buffer (flat, BNL join)
Warnings:
Note 1003 select `test`.`t2`.`a` AS `a` from `test`.`t1` join `test`.`t2` where `test`.`t1`.`a` = `test`.`t2`.`a` and `test`.`t1`.`b` <> 30
select * from t2 where t2.a in (select t1.a from t1,t3 where t1.b=t3.a);
@ -1459,11 +1459,11 @@ a
3
explain extended select * from t2 where t2.a in (select t1.a from t1,t3 where t1.b=t3.a);
id select_type table type possible_keys key key_len ref rows filtered Extra
1 PRIMARY t2 index PRIMARY PRIMARY 4 NULL 4 100.00 Using index
1 PRIMARY t1 eq_ref PRIMARY PRIMARY 4 test.t2.a 1 100.00
1 PRIMARY t3 index PRIMARY PRIMARY 4 NULL 3 100.00 Using where; Using index; Using join buffer (flat, BNL join)
1 PRIMARY t1 ALL PRIMARY NULL NULL NULL 4 100.00
1 PRIMARY t3 index PRIMARY PRIMARY 4 NULL 3 75.00 Using where; Using index; Using join buffer (flat, BNL join)
1 PRIMARY t2 eq_ref PRIMARY PRIMARY 4 test.t1.a 1 100.00 Using index
Warnings:
Note 1003 select `test`.`t2`.`a` AS `a` from `test`.`t1` join `test`.`t3` join `test`.`t2` where `test`.`t3`.`a` = `test`.`t1`.`b` and `test`.`t1`.`a` = `test`.`t2`.`a`
Note 1003 select `test`.`t2`.`a` AS `a` from `test`.`t1` join `test`.`t3` join `test`.`t2` where `test`.`t3`.`a` = `test`.`t1`.`b` and `test`.`t2`.`a` = `test`.`t1`.`a`
drop table t1, t2, t3;
create table t1 (a int, b int, index a (a,b));
create table t2 (a int, index a (a));

2
mysql-test/main/subselect3.result
View File

@ -166,7 +166,7 @@ from t3;
id select_type table type possible_keys key key_len ref rows filtered Extra
1 PRIMARY t3 ALL NULL NULL NULL NULL 3 100.00
2 DEPENDENT SUBQUERY t1 ref_or_null a a 5 func 4 100.00 Using where; Full scan on NULL key
2 DEPENDENT SUBQUERY t2 ref a a 5 test.t1.b 1 100.00 Using where
2 DEPENDENT SUBQUERY t2 ALL a NULL NULL NULL 10 75.00 Using where; Using join buffer (flat, BNL join)
Warnings:
Note 1276 Field or reference 'test.t3.oref' of SELECT #2 was resolved in SELECT #1
Note 1003 /* select#1 */ select `test`.`t3`.`a` AS `a`,`test`.`t3`.`oref` AS `oref`,<expr_cache><`test`.`t3`.`a`,`test`.`t3`.`oref`>(<in_optimizer>(`test`.`t3`.`a`,<exists>(/* select#2 */ select `test`.`t1`.`a` from `test`.`t1` join `test`.`t2` where `test`.`t2`.`a` = `test`.`t1`.`b` and `test`.`t2`.`b` = `test`.`t3`.`oref` and trigcond(<cache>(`test`.`t3`.`a`) = `test`.`t1`.`a` or `test`.`t1`.`a` is null) having trigcond(`test`.`t1`.`a` is null)))) AS `Z` from `test`.`t3`

2
mysql-test/main/subselect3_jcl6.result
View File

@ -169,7 +169,7 @@ from t3;
id select_type table type possible_keys key key_len ref rows filtered Extra
1 PRIMARY t3 ALL NULL NULL NULL NULL 3 100.00
2 DEPENDENT SUBQUERY t1 ref_or_null a a 5 func 4 100.00 Using where; Full scan on NULL key
2 DEPENDENT SUBQUERY t2 ref a a 5 test.t1.b 1 100.00 Using where; Using join buffer (flat, BKA join); Key-ordered Rowid-ordered scan
2 DEPENDENT SUBQUERY t2 ALL a NULL NULL NULL 10 75.00 Using where; Using join buffer (flat, BNL join)
Warnings:
Note 1276 Field or reference 'test.t3.oref' of SELECT #2 was resolved in SELECT #1
Note 1003 /* select#1 */ select `test`.`t3`.`a` AS `a`,`test`.`t3`.`oref` AS `oref`,<expr_cache><`test`.`t3`.`a`,`test`.`t3`.`oref`>(<in_optimizer>(`test`.`t3`.`a`,<exists>(/* select#2 */ select `test`.`t1`.`a` from `test`.`t1` join `test`.`t2` where `test`.`t2`.`a` = `test`.`t1`.`b` and `test`.`t2`.`b` = `test`.`t3`.`oref` and trigcond(<cache>(`test`.`t3`.`a`) = `test`.`t1`.`a` or `test`.`t1`.`a` is null) having trigcond(`test`.`t1`.`a` is null)))) AS `Z` from `test`.`t3`

2
mysql-test/main/subselect_exists2in.result
View File

@ -52,7 +52,7 @@ explain extended
SELECT * FROM t1 WHERE EXISTS ( SELECT a FROM t3 WHERE t3.b = t1.a);
id select_type table type possible_keys key key_len ref rows filtered Extra
1 PRIMARY t1 index aa aa 4 NULL 2 100.00 Using index
1 PRIMARY t3 ALL bb NULL NULL NULL 2 100.00 Using where; FirstMatch(t1); Using join buffer (flat, BNL join)
1 PRIMARY t3 ALL bb NULL NULL NULL 2 75.00 Using where; FirstMatch(t1); Using join buffer (flat, BNL join)
Warnings:
Note 1276 Field or reference 'test.t1.a' of SELECT #2 was resolved in SELECT #1
Note 1003 select `test`.`t1`.`a` AS `a` from `test`.`t1` semi join (`test`.`t3`) where `test`.`t3`.`b` = `test`.`t1`.`a`

4
mysql-test/main/subselect_mat.result
View File

@ -1889,8 +1889,8 @@ WHERE alias4.c = alias3.b
);
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY NULL NULL NULL NULL NULL NULL NULL Impossible WHERE noticed after reading const tables
3 MATERIALIZED alias3 ALL NULL NULL NULL NULL 2 Using where
3 MATERIALIZED alias4 ref c c 11 test.alias3.b 2 Using where; Using index
3 MATERIALIZED alias3 ALL NULL NULL NULL NULL 2
3 MATERIALIZED alias4 index c c 11 NULL 2 Using where; Using index; Using join buffer (flat, BNL join)
DROP TABLE t1,t2;
#
# BUG#928048: Query containing IN subquery with OR in the where clause returns a wrong result

2
mysql-test/main/subselect_mat_cost_bugs.result
View File

@ -97,7 +97,7 @@ id select_type table type possible_keys key key_len ref rows filtered Extra
1 PRIMARY t1 ALL NULL NULL NULL NULL 9 100.00 Using where
2 DEPENDENT SUBQUERY t1b ALL NULL NULL NULL NULL 9 100.00
2 DEPENDENT SUBQUERY t1a ref c2 c2 5 test.t1b.pk 1 100.00 Using where
2 DEPENDENT SUBQUERY t2 index c3 c3 9 NULL 2 100.00 Using where; Using index; Using join buffer (flat, BNL join)
2 DEPENDENT SUBQUERY t2 index c3 c3 9 NULL 2 75.00 Using where; Using index; Using join buffer (flat, BNL join)
Warnings:
Note 1276 Field or reference 'test.t1.pk' of SELECT #2 was resolved in SELECT #1
Note 1003 /* select#1 */ select `test`.`t1`.`pk` AS `pk` from `test`.`t1` where <expr_cache><`test`.`t1`.`c1`,`test`.`t1`.`pk`>(<in_optimizer>(`test`.`t1`.`c1`,<exists>(/* select#2 */ select `test`.`t1a`.`c1` from `test`.`t1b` join `test`.`t2` left join `test`.`t1a` on(`test`.`t1a`.`c2` = `test`.`t1b`.`pk` and 2) where `test`.`t2`.`c3` = `test`.`t1b`.`c4` and `test`.`t1`.`pk` <> 0 and <cache>(`test`.`t1`.`c1`) = `test`.`t1a`.`c1`)))

12
mysql-test/main/subselect_no_exists_to_in.result
View File

@ -1444,7 +1444,7 @@ a
explain extended select * from t2 where t2.a in (select a from t1);
id select_type table type possible_keys key key_len ref rows filtered Extra
1 PRIMARY t2 index PRIMARY PRIMARY 4 NULL 4 100.00 Using index
1 PRIMARY t1 eq_ref PRIMARY PRIMARY 4 test.t2.a 1 100.00 Using index
1 PRIMARY t1 index PRIMARY PRIMARY 4 NULL 4 75.00 Using where; Using index; Using join buffer (flat, BNL join)
Warnings:
Note 1003 select `test`.`t2`.`a` AS `a` from `test`.`t1` join `test`.`t2` where `test`.`t1`.`a` = `test`.`t2`.`a`
select * from t2 where t2.a in (select a from t1 where t1.b <> 30);
@ -1454,7 +1454,7 @@ a
explain extended select * from t2 where t2.a in (select a from t1 where t1.b <> 30);
id select_type table type possible_keys key key_len ref rows filtered Extra
1 PRIMARY t2 index PRIMARY PRIMARY 4 NULL 4 100.00 Using index
1 PRIMARY t1 eq_ref PRIMARY PRIMARY 4 test.t2.a 1 100.00 Using where
1 PRIMARY t1 ALL PRIMARY NULL NULL NULL 4 75.00 Using where; Using join buffer (flat, BNL join)
Warnings:
Note 1003 select `test`.`t2`.`a` AS `a` from `test`.`t1` join `test`.`t2` where `test`.`t1`.`a` = `test`.`t2`.`a` and `test`.`t1`.`b` <> 30
select * from t2 where t2.a in (select t1.a from t1,t3 where t1.b=t3.a);
@ -1463,11 +1463,11 @@ a
3
explain extended select * from t2 where t2.a in (select t1.a from t1,t3 where t1.b=t3.a);
id select_type table type possible_keys key key_len ref rows filtered Extra
1 PRIMARY t2 index PRIMARY PRIMARY 4 NULL 4 100.00 Using index
1 PRIMARY t1 eq_ref PRIMARY PRIMARY 4 test.t2.a 1 100.00
1 PRIMARY t3 index PRIMARY PRIMARY 4 NULL 3 100.00 Using where; Using index; Using join buffer (flat, BNL join)
1 PRIMARY t1 ALL PRIMARY NULL NULL NULL 4 100.00
1 PRIMARY t3 index PRIMARY PRIMARY 4 NULL 3 75.00 Using where; Using index; Using join buffer (flat, BNL join)
1 PRIMARY t2 eq_ref PRIMARY PRIMARY 4 test.t1.a 1 100.00 Using index
Warnings:
Note 1003 select `test`.`t2`.`a` AS `a` from `test`.`t1` join `test`.`t3` join `test`.`t2` where `test`.`t3`.`a` = `test`.`t1`.`b` and `test`.`t1`.`a` = `test`.`t2`.`a`
Note 1003 select `test`.`t2`.`a` AS `a` from `test`.`t1` join `test`.`t3` join `test`.`t2` where `test`.`t3`.`a` = `test`.`t1`.`b` and `test`.`t2`.`a` = `test`.`t1`.`a`
drop table t1, t2, t3;
create table t1 (a int, b int, index a (a,b));
create table t2 (a int, index a (a));

14
mysql-test/main/subselect_no_mat.result
View File

@ -352,7 +352,7 @@ patient_uq clinic_uq
explain extended select * from t6 where exists (select * from t7 where uq = clinic_uq);
id select_type table type possible_keys key key_len ref rows filtered Extra
1 PRIMARY t7 index PRIMARY PRIMARY 4 NULL 2 100.00 Using index
1 PRIMARY t6 ALL i1 NULL NULL NULL 4 100.00 Using where; Using join buffer (flat, BNL join)
1 PRIMARY t6 ALL i1 NULL NULL NULL 4 75.00 Using where; Using join buffer (flat, BNL join)
Warnings:
Note 1276 Field or reference 'test.t6.clinic_uq' of SELECT #2 was resolved in SELECT #1
Note 1003 select `test`.`t6`.`patient_uq` AS `patient_uq`,`test`.`t6`.`clinic_uq` AS `clinic_uq` from `test`.`t7` join `test`.`t6` where `test`.`t6`.`clinic_uq` = `test`.`t7`.`uq`
@ -1447,7 +1447,7 @@ a
explain extended select * from t2 where t2.a in (select a from t1);
id select_type table type possible_keys key key_len ref rows filtered Extra
1 PRIMARY t2 index PRIMARY PRIMARY 4 NULL 4 100.00 Using index
1 PRIMARY t1 eq_ref PRIMARY PRIMARY 4 test.t2.a 1 100.00 Using index
1 PRIMARY t1 index PRIMARY PRIMARY 4 NULL 4 75.00 Using where; Using index; Using join buffer (flat, BNL join)
Warnings:
Note 1003 select `test`.`t2`.`a` AS `a` from `test`.`t1` join `test`.`t2` where `test`.`t1`.`a` = `test`.`t2`.`a`
select * from t2 where t2.a in (select a from t1 where t1.b <> 30);
@ -1457,7 +1457,7 @@ a
explain extended select * from t2 where t2.a in (select a from t1 where t1.b <> 30);
id select_type table type possible_keys key key_len ref rows filtered Extra
1 PRIMARY t2 index PRIMARY PRIMARY 4 NULL 4 100.00 Using index
1 PRIMARY t1 eq_ref PRIMARY PRIMARY 4 test.t2.a 1 100.00 Using where
1 PRIMARY t1 ALL PRIMARY NULL NULL NULL 4 75.00 Using where; Using join buffer (flat, BNL join)
Warnings:
Note 1003 select `test`.`t2`.`a` AS `a` from `test`.`t1` join `test`.`t2` where `test`.`t1`.`a` = `test`.`t2`.`a` and `test`.`t1`.`b` <> 30
select * from t2 where t2.a in (select t1.a from t1,t3 where t1.b=t3.a);
@ -1466,11 +1466,11 @@ a
3
explain extended select * from t2 where t2.a in (select t1.a from t1,t3 where t1.b=t3.a);
id select_type table type possible_keys key key_len ref rows filtered Extra
1 PRIMARY t2 index PRIMARY PRIMARY 4 NULL 4 100.00 Using index
1 PRIMARY t1 eq_ref PRIMARY PRIMARY 4 test.t2.a 1 100.00
1 PRIMARY t3 index PRIMARY PRIMARY 4 NULL 3 100.00 Using where; Using index; Using join buffer (flat, BNL join)
1 PRIMARY t1 ALL PRIMARY NULL NULL NULL 4 100.00
1 PRIMARY t3 index PRIMARY PRIMARY 4 NULL 3 75.00 Using where; Using index; Using join buffer (flat, BNL join)
1 PRIMARY t2 eq_ref PRIMARY PRIMARY 4 test.t1.a 1 100.00 Using index
Warnings:
Note 1003 select `test`.`t2`.`a` AS `a` from `test`.`t1` join `test`.`t3` join `test`.`t2` where `test`.`t3`.`a` = `test`.`t1`.`b` and `test`.`t1`.`a` = `test`.`t2`.`a`
Note 1003 select `test`.`t2`.`a` AS `a` from `test`.`t1` join `test`.`t3` join `test`.`t2` where `test`.`t3`.`a` = `test`.`t1`.`b` and `test`.`t2`.`a` = `test`.`t1`.`a`
drop table t1, t2, t3;
create table t1 (a int, b int, index a (a,b));
create table t2 (a int, index a (a));

6
mysql-test/main/subselect_no_opts.result
View File

@ -1506,10 +1506,10 @@ a
explain extended select * from t2 where t2.a in (select t1.a from t1,t3 where t1.b=t3.a);
id select_type table type possible_keys key key_len ref rows filtered Extra
1 PRIMARY t2 index NULL a 5 NULL 4 100.00 Using where; Using index
2 DEPENDENT SUBQUERY t3 index a a 5 NULL 3 100.00 Using where; Using index
2 DEPENDENT SUBQUERY t1 ref a a 10 func,test.t3.a 1167 100.00 Using index
2 DEPENDENT SUBQUERY t1 ref a a 5 func 1001 100.00 Using index
2 DEPENDENT SUBQUERY t3 index a a 5 NULL 3 75.00 Using where; Using index; Using join buffer (flat, BNL join)
Warnings:
Note 1003 /* select#1 */ select `test`.`t2`.`a` AS `a` from `test`.`t2` where <in_optimizer>(`test`.`t2`.`a`,<exists>(/* select#2 */ select `test`.`t1`.`a` from `test`.`t1` join `test`.`t3` where `test`.`t1`.`b` = `test`.`t3`.`a` and <cache>(`test`.`t2`.`a`) = `test`.`t1`.`a`))
Note 1003 /* select#1 */ select `test`.`t2`.`a` AS `a` from `test`.`t2` where <in_optimizer>(`test`.`t2`.`a`,<exists>(/* select#2 */ select `test`.`t1`.`a` from `test`.`t1` join `test`.`t3` where `test`.`t3`.`a` = `test`.`t1`.`b` and <cache>(`test`.`t2`.`a`) = `test`.`t1`.`a`))
insert into t1 values (3,31);
select * from t2 where t2.a in (select a from t1 where t1.b <> 30);
a

14
mysql-test/main/subselect_no_scache.result
View File

@ -351,7 +351,7 @@ patient_uq clinic_uq
explain extended select * from t6 where exists (select * from t7 where uq = clinic_uq);
id select_type table type possible_keys key key_len ref rows filtered Extra
1 PRIMARY t7 index PRIMARY PRIMARY 4 NULL 2 100.00 Using index
1 PRIMARY t6 ALL i1 NULL NULL NULL 4 100.00 Using where; Using join buffer (flat, BNL join)
1 PRIMARY t6 ALL i1 NULL NULL NULL 4 75.00 Using where; Using join buffer (flat, BNL join)
Warnings:
Note 1276 Field or reference 'test.t6.clinic_uq' of SELECT #2 was resolved in SELECT #1
Note 1003 select `test`.`t6`.`patient_uq` AS `patient_uq`,`test`.`t6`.`clinic_uq` AS `clinic_uq` from `test`.`t7` join `test`.`t6` where `test`.`t6`.`clinic_uq` = `test`.`t7`.`uq`
@ -1446,7 +1446,7 @@ a
explain extended select * from t2 where t2.a in (select a from t1);
id select_type table type possible_keys key key_len ref rows filtered Extra
1 PRIMARY t2 index PRIMARY PRIMARY 4 NULL 4 100.00 Using index
1 PRIMARY t1 eq_ref PRIMARY PRIMARY 4 test.t2.a 1 100.00 Using index
1 PRIMARY t1 index PRIMARY PRIMARY 4 NULL 4 75.00 Using where; Using index; Using join buffer (flat, BNL join)
Warnings:
Note 1003 select `test`.`t2`.`a` AS `a` from `test`.`t1` join `test`.`t2` where `test`.`t1`.`a` = `test`.`t2`.`a`
select * from t2 where t2.a in (select a from t1 where t1.b <> 30);
@ -1456,7 +1456,7 @@ a
explain extended select * from t2 where t2.a in (select a from t1 where t1.b <> 30);
id select_type table type possible_keys key key_len ref rows filtered Extra
1 PRIMARY t2 index PRIMARY PRIMARY 4 NULL 4 100.00 Using index
1 PRIMARY t1 eq_ref PRIMARY PRIMARY 4 test.t2.a 1 100.00 Using where
1 PRIMARY t1 ALL PRIMARY NULL NULL NULL 4 75.00 Using where; Using join buffer (flat, BNL join)
Warnings:
Note 1003 select `test`.`t2`.`a` AS `a` from `test`.`t1` join `test`.`t2` where `test`.`t1`.`a` = `test`.`t2`.`a` and `test`.`t1`.`b` <> 30
select * from t2 where t2.a in (select t1.a from t1,t3 where t1.b=t3.a);
@ -1465,11 +1465,11 @@ a
3
explain extended select * from t2 where t2.a in (select t1.a from t1,t3 where t1.b=t3.a);
id select_type table type possible_keys key key_len ref rows filtered Extra
1 PRIMARY t2 index PRIMARY PRIMARY 4 NULL 4 100.00 Using index
1 PRIMARY t1 eq_ref PRIMARY PRIMARY 4 test.t2.a 1 100.00
1 PRIMARY t3 index PRIMARY PRIMARY 4 NULL 3 100.00 Using where; Using index; Using join buffer (flat, BNL join)
1 PRIMARY t1 ALL PRIMARY NULL NULL NULL 4 100.00
1 PRIMARY t3 index PRIMARY PRIMARY 4 NULL 3 75.00 Using where; Using index; Using join buffer (flat, BNL join)
1 PRIMARY t2 eq_ref PRIMARY PRIMARY 4 test.t1.a 1 100.00 Using index
Warnings:
Note 1003 select `test`.`t2`.`a` AS `a` from `test`.`t1` join `test`.`t3` join `test`.`t2` where `test`.`t3`.`a` = `test`.`t1`.`b` and `test`.`t1`.`a` = `test`.`t2`.`a`
Note 1003 select `test`.`t2`.`a` AS `a` from `test`.`t1` join `test`.`t3` join `test`.`t2` where `test`.`t3`.`a` = `test`.`t1`.`b` and `test`.`t2`.`a` = `test`.`t1`.`a`
drop table t1, t2, t3;
create table t1 (a int, b int, index a (a,b));
create table t2 (a int, index a (a));

18
mysql-test/main/subselect_no_semijoin.result
View File

@ -925,10 +925,10 @@ a t1.a in (select t2.a from t2,t3 where t3.a=t2.a)
explain extended SELECT t1.a, t1.a in (select t2.a from t2,t3 where t3.a=t2.a) FROM t1;
id select_type table type possible_keys key key_len ref rows filtered Extra
1 PRIMARY t1 index NULL PRIMARY 4 NULL 4 100.00 Using index
2 MATERIALIZED t2 index a a 5 NULL 3 100.00 Using index
2 MATERIALIZED t3 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer (flat, BNL join)
2 MATERIALIZED t3 ALL NULL NULL NULL NULL 3 100.00
2 MATERIALIZED t2 index a a 5 NULL 3 75.00 Using where; Using index; Using join buffer (flat, BNL join)
Warnings:
Note 1003 /* select#1 */ select `test`.`t1`.`a` AS `a`,<expr_cache><`test`.`t1`.`a`>(<in_optimizer>(`test`.`t1`.`a`,`test`.`t1`.`a` in ( <materialize> (/* select#2 */ select `test`.`t2`.`a` from `test`.`t2` join `test`.`t3` where `test`.`t3`.`a` = `test`.`t2`.`a` ), <primary_index_lookup>(`test`.`t1`.`a` in <temporary table> on distinct_key where `test`.`t1`.`a` = `<subquery2>`.`a`)))) AS `t1.a in (select t2.a from t2,t3 where t3.a=t2.a)` from `test`.`t1`
Note 1003 /* select#1 */ select `test`.`t1`.`a` AS `a`,<expr_cache><`test`.`t1`.`a`>(<in_optimizer>(`test`.`t1`.`a`,`test`.`t1`.`a` in ( <materialize> (/* select#2 */ select `test`.`t2`.`a` from `test`.`t2` join `test`.`t3` where `test`.`t2`.`a` = `test`.`t3`.`a` ), <primary_index_lookup>(`test`.`t1`.`a` in <temporary table> on distinct_key where `test`.`t1`.`a` = `<subquery2>`.`a`)))) AS `t1.a in (select t2.a from t2,t3 where t3.a=t2.a)` from `test`.`t1`
drop table t1,t2,t3;
# check correct NULL Processing for normal IN/ALL/ANY
# and 2 ways of max/min optimization
@ -1463,10 +1463,10 @@ a
explain extended select * from t2 where t2.a in (select t1.a from t1,t3 where t1.b=t3.a);
id select_type table type possible_keys key key_len ref rows filtered Extra
1 PRIMARY t2 index NULL PRIMARY 4 NULL 4 100.00 Using where; Using index
2 MATERIALIZED t3 index PRIMARY PRIMARY 4 NULL 3 100.00 Using index
2 MATERIALIZED t1 ALL PRIMARY NULL NULL NULL 4 100.00 Using where; Using join buffer (flat, BNL join)
2 MATERIALIZED t1 ALL PRIMARY NULL NULL NULL 4 100.00
2 MATERIALIZED t3 index PRIMARY PRIMARY 4 NULL 3 75.00 Using where; Using index; Using join buffer (flat, BNL join)
Warnings:
Note 1003 /* select#1 */ select `test`.`t2`.`a` AS `a` from `test`.`t2` where <expr_cache><`test`.`t2`.`a`>(<in_optimizer>(`test`.`t2`.`a`,`test`.`t2`.`a` in ( <materialize> (/* select#2 */ select `test`.`t1`.`a` from `test`.`t1` join `test`.`t3` where `test`.`t1`.`b` = `test`.`t3`.`a` ), <primary_index_lookup>(`test`.`t2`.`a` in <temporary table> on distinct_key where `test`.`t2`.`a` = `<subquery2>`.`a`))))
Note 1003 /* select#1 */ select `test`.`t2`.`a` AS `a` from `test`.`t2` where <expr_cache><`test`.`t2`.`a`>(<in_optimizer>(`test`.`t2`.`a`,`test`.`t2`.`a` in ( <materialize> (/* select#2 */ select `test`.`t1`.`a` from `test`.`t1` join `test`.`t3` where `test`.`t3`.`a` = `test`.`t1`.`b` ), <primary_index_lookup>(`test`.`t2`.`a` in <temporary table> on distinct_key where `test`.`t2`.`a` = `<subquery2>`.`a`))))
drop table t1, t2, t3;
create table t1 (a int, b int, index a (a,b));
create table t2 (a int, index a (a));
@ -1506,10 +1506,10 @@ a
explain extended select * from t2 where t2.a in (select t1.a from t1,t3 where t1.b=t3.a);
id select_type table type possible_keys key key_len ref rows filtered Extra
1 PRIMARY t2 index NULL a 5 NULL 4 100.00 Using where; Using index
2 DEPENDENT SUBQUERY t3 index a a 5 NULL 3 100.00 Using where; Using index
2 DEPENDENT SUBQUERY t1 ref a a 10 func,test.t3.a 1167 100.00 Using index
2 DEPENDENT SUBQUERY t1 ref a a 5 func 1001 100.00 Using index
2 DEPENDENT SUBQUERY t3 index a a 5 NULL 3 75.00 Using where; Using index; Using join buffer (flat, BNL join)
Warnings:
Note 1003 /* select#1 */ select `test`.`t2`.`a` AS `a` from `test`.`t2` where <expr_cache><`test`.`t2`.`a`>(<in_optimizer>(`test`.`t2`.`a`,<exists>(/* select#2 */ select `test`.`t1`.`a` from `test`.`t1` join `test`.`t3` where `test`.`t1`.`b` = `test`.`t3`.`a` and <cache>(`test`.`t2`.`a`) = `test`.`t1`.`a`)))
Note 1003 /* select#1 */ select `test`.`t2`.`a` AS `a` from `test`.`t2` where <expr_cache><`test`.`t2`.`a`>(<in_optimizer>(`test`.`t2`.`a`,<exists>(/* select#2 */ select `test`.`t1`.`a` from `test`.`t1` join `test`.`t3` where `test`.`t3`.`a` = `test`.`t1`.`b` and <cache>(`test`.`t2`.`a`) = `test`.`t1`.`a`)))
insert into t1 values (3,31);
select * from t2 where t2.a in (select a from t1 where t1.b <> 30);
a

16
mysql-test/main/subselect_sj.result
View File

@ -1249,8 +1249,8 @@ INSERT INTO t2 VALUES (1, 0), (1, 1), (2, 0), (2, 1);
EXPLAIN
SELECT * FROM t1 WHERE (i) IN (SELECT i FROM t2 where j > 0);
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t2 index k k 10 NULL 4 Using where; Using index; Start temporary
1 PRIMARY t1 ALL NULL NULL NULL NULL 5 Using where; End temporary; Using join buffer (flat, BNL join)
1 PRIMARY t1 ALL NULL NULL NULL NULL 5
1 PRIMARY t2 index k k 10 NULL 4 Using where; Using index; Start temporary; End temporary
SELECT * FROM t1 WHERE (i) IN (SELECT i FROM t2 where j > 0);
i
1
@ -1610,9 +1610,9 @@ A.t1field IN (SELECT C.t2field FROM t2 C
WHERE C.t2field IN (SELECT D.t2field FROM t2 D));
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY A index PRIMARY PRIMARY 4 NULL 3 Using index
1 PRIMARY C eq_ref PRIMARY PRIMARY 4 test.A.t1field 1 Using index
1 PRIMARY D eq_ref PRIMARY PRIMARY 4 test.A.t1field 1 Using index
1 PRIMARY B index NULL PRIMARY 4 NULL 3 Using index; Start temporary; End temporary
1 PRIMARY C index PRIMARY PRIMARY 4 NULL 3 Using where; Using index; Using join buffer (flat, BNL join)
1 PRIMARY D eq_ref PRIMARY PRIMARY 4 test.A.t1field 1 Using index
SELECT * FROM t1 A
WHERE
A.t1field IN (SELECT A.t1field FROM t2 B) AND
@ -2154,8 +2154,8 @@ explain
SELECT * FROM t1, t2 WHERE (t2.a , t1.b) IN (SELECT a, b FROM t3);
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t1 ALL NULL NULL NULL NULL 2
1 PRIMARY t2 index PRIMARY PRIMARY 4 NULL 2 Using index; Using join buffer (flat, BNL join)
1 PRIMARY t3 ALL b NULL NULL NULL 5 Using where; Start temporary; End temporary
1 PRIMARY t3 ALL b NULL NULL NULL 5 Using where; Start temporary
1 PRIMARY t2 index PRIMARY PRIMARY 4 NULL 2 Using where; Using index; End temporary; Using join buffer (flat, BNL join)
SELECT * FROM t1, t2 WHERE (t2.a , t1.b) IN (SELECT a, b FROM t3);
b a
5 6
@ -2350,8 +2350,8 @@ SELECT * FROM t1 WHERE (a) IN (SELECT a FROM t2 JOIN t3 ON b = a);
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t1 ALL NULL NULL NULL NULL 9
1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 4 func 1
2 MATERIALIZED t3 ALL NULL NULL NULL NULL 13 Using where
2 MATERIALIZED t2 ref b b 4 test.t3.a 1 Using index
2 MATERIALIZED t3 ALL NULL NULL NULL NULL 13
2 MATERIALIZED t2 index b b 8 NULL 7 Using where; Using index
SELECT * FROM t1 WHERE (a) IN (SELECT a FROM t2 JOIN t3 ON b = a);
a
19

16
mysql-test/main/subselect_sj_jcl6.result
View File

@ -1260,8 +1260,8 @@ INSERT INTO t2 VALUES (1, 0), (1, 1), (2, 0), (2, 1);
EXPLAIN
SELECT * FROM t1 WHERE (i) IN (SELECT i FROM t2 where j > 0);
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t2 index k k 10 NULL 4 Using where; Using index; Start temporary
1 PRIMARY t1 ALL NULL NULL NULL NULL 5 Using where; End temporary; Using join buffer (flat, BNL join)
1 PRIMARY t1 ALL NULL NULL NULL NULL 5
1 PRIMARY t2 index k k 10 NULL 4 Using where; Using index; Start temporary; End temporary; Using join buffer (flat, BNL join)
SELECT * FROM t1 WHERE (i) IN (SELECT i FROM t2 where j > 0);
i
1
@ -1621,9 +1621,9 @@ A.t1field IN (SELECT C.t2field FROM t2 C
WHERE C.t2field IN (SELECT D.t2field FROM t2 D));
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY A index PRIMARY PRIMARY 4 NULL 3 Using index
1 PRIMARY C eq_ref PRIMARY PRIMARY 4 test.A.t1field 1 Using index
1 PRIMARY B index NULL PRIMARY 4 NULL 3 Using index; FirstMatch(A); Using join buffer (flat, BNL join)
1 PRIMARY C index PRIMARY PRIMARY 4 NULL 3 Using where; Using index; Using join buffer (incremental, BNL join)
1 PRIMARY D eq_ref PRIMARY PRIMARY 4 test.A.t1field 1 Using index
1 PRIMARY B index NULL PRIMARY 4 NULL 3 Using index; FirstMatch(D); Using join buffer (flat, BNL join)
SELECT * FROM t1 A
WHERE
A.t1field IN (SELECT A.t1field FROM t2 B) AND
@ -2165,8 +2165,8 @@ explain
SELECT * FROM t1, t2 WHERE (t2.a , t1.b) IN (SELECT a, b FROM t3);
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t1 ALL NULL NULL NULL NULL 2
1 PRIMARY t2 index PRIMARY PRIMARY 4 NULL 2 Using index; Using join buffer (flat, BNL join)
1 PRIMARY t3 ALL b NULL NULL NULL 5 Using where; Start temporary; End temporary; Using join buffer (incremental, BNL join)
1 PRIMARY t3 ALL b NULL NULL NULL 5 Using where; Start temporary; Using join buffer (flat, BNL join)
1 PRIMARY t2 index PRIMARY PRIMARY 4 NULL 2 Using where; Using index; End temporary; Using join buffer (incremental, BNL join)
SELECT * FROM t1, t2 WHERE (t2.a , t1.b) IN (SELECT a, b FROM t3);
b a
5 6
@ -2361,8 +2361,8 @@ SELECT * FROM t1 WHERE (a) IN (SELECT a FROM t2 JOIN t3 ON b = a);
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t1 ALL NULL NULL NULL NULL 9
1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 4 func 1
2 MATERIALIZED t3 ALL NULL NULL NULL NULL 13 Using where
2 MATERIALIZED t2 ref b b 4 test.t3.a 1 Using index
2 MATERIALIZED t3 ALL NULL NULL NULL NULL 13
2 MATERIALIZED t2 index b b 8 NULL 7 Using where; Using index; Using join buffer (flat, BNL join)
SELECT * FROM t1 WHERE (a) IN (SELECT a FROM t2 JOIN t3 ON b = a);
a
19

10
mysql-test/main/subselect_sj_mat.result
View File

@ -380,7 +380,7 @@ id select_type table type possible_keys key key_len ref rows filtered Extra
1 PRIMARY <subquery5> eq_ref distinct_key distinct_key 16 func,func 1 100.00
2 MATERIALIZED t2 ALL NULL NULL NULL NULL 5 100.00 Using where
5 MATERIALIZED t3 ALL NULL NULL NULL NULL 4 100.00 Using where
5 MATERIALIZED t2i ref it2i1,it2i2,it2i3 it2i3 18 test.t3.c1,test.t3.c2 1 100.00 Using index
5 MATERIALIZED t2i index it2i1,it2i2,it2i3 it2i3 18 NULL 5 75.00 Using where; Using index; Using join buffer (flat, BNL join)
4 MATERIALIZED t3 ALL NULL NULL NULL NULL 4 100.00 Using where
3 MATERIALIZED t3 ALL NULL NULL NULL NULL 4 100.00 Using where
Warnings:
@ -405,7 +405,7 @@ id select_type table type possible_keys key key_len ref rows filtered Extra
1 PRIMARY t2 ALL NULL NULL NULL NULL 5 100.00 Using where; Start temporary; End temporary; Using join buffer (flat, BNL join)
1 PRIMARY <subquery5> eq_ref distinct_key distinct_key 16 func,func 1 100.00
5 MATERIALIZED t3c ALL NULL NULL NULL NULL 4 100.00 Using where
5 MATERIALIZED t2i ref it2i1,it2i2,it2i3 it2i3 18 test.t3c.c1,test.t3c.c2 1 100.00 Using index
5 MATERIALIZED t2i index it2i1,it2i2,it2i3 it2i3 18 NULL 5 75.00 Using where; Using index; Using join buffer (flat, BNL join)
4 MATERIALIZED t3b ALL NULL NULL NULL NULL 4 100.00 Using where
3 DEPENDENT SUBQUERY t3a ALL NULL NULL NULL NULL 4 100.00 Using where
Warnings:
@ -439,7 +439,7 @@ id select_type table type possible_keys key key_len ref rows filtered Extra
1 PRIMARY <subquery5> eq_ref distinct_key # # # 1 100.00 #
2 MATERIALIZED t2 ALL NULL # # # 5 100.00 #
5 MATERIALIZED t3 ALL NULL # # # 4 100.00 #
5 MATERIALIZED t2i ref it2i1,it2i2,it2i3 # # # 1 100.00 #
5 MATERIALIZED t2i index it2i1,it2i2,it2i3 # # # 5 75.00 #
4 MATERIALIZED t3 ALL NULL # # # 4 100.00 #
3 MATERIALIZED t3 ALL NULL # # # 4 100.00 #
7 UNION t1i range it1i1,it1i2,it1i3 # # # 3 100.00 #
@ -475,7 +475,7 @@ id select_type table type possible_keys key key_len ref rows filtered Extra
1 PRIMARY t1 ALL NULL NULL NULL NULL 3 100.00 Using where
1 PRIMARY <subquery4> eq_ref distinct_key distinct_key 16 func,func 1 100.00
4 MATERIALIZED t3 ALL NULL NULL NULL NULL 4 100.00 Using where
4 MATERIALIZED t2i ref it2i1,it2i2,it2i3 it2i3 18 test.t3.c1,test.t3.c2 1 100.00 Using index
4 MATERIALIZED t2i index it2i1,it2i2,it2i3 it2i3 18 NULL 5 75.00 Using where; Using index; Using join buffer (flat, BNL join)
2 DEPENDENT SUBQUERY t1 ALL NULL NULL NULL NULL 3 100.00 Using where
3 DEPENDENT UNION t2 ALL NULL NULL NULL NULL 5 100.00 Using where
NULL UNION RESULT <union2,3> ALL NULL NULL NULL NULL NULL NULL
@ -499,7 +499,7 @@ id select_type table type possible_keys key key_len ref rows filtered Extra
1 PRIMARY t3 ALL NULL NULL NULL NULL 4 100.00 Using where; Using join buffer (flat, BNL join)
1 PRIMARY <subquery4> eq_ref distinct_key distinct_key 16 func,func 1 100.00
4 MATERIALIZED t3 ALL NULL NULL NULL NULL 4 100.00 Using where
4 MATERIALIZED t2i ref it2i1,it2i2,it2i3 it2i3 18 test.t3.c1,test.t3.c2 1 100.00 Using index
4 MATERIALIZED t2i index it2i1,it2i2,it2i3 it2i3 18 NULL 5 75.00 Using where; Using index; Using join buffer (flat, BNL join)
2 DEPENDENT SUBQUERY t1 ALL NULL NULL NULL NULL 3 100.00 Using where
3 DEPENDENT UNION t2 ALL NULL NULL NULL NULL 5 100.00 Using where
NULL UNION RESULT <union2,3> ALL NULL NULL NULL NULL NULL NULL

2
mysql-test/main/union.result
View File

@ -565,7 +565,7 @@ explain (select * from t1 where a=1 and b=10) union (select straight_join t1.a,t
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY NULL NULL NULL NULL NULL NULL NULL Impossible WHERE noticed after reading const tables
2 UNION t1 index PRIMARY PRIMARY 4 NULL 4 Using index
2 UNION t2 eq_ref PRIMARY PRIMARY 4 test.t1.a 1 Using index
2 UNION t2 index PRIMARY PRIMARY 4 NULL 4 Using where; Using index; Using join buffer (flat, BNL join)
NULL UNION RESULT <union1,2> ALL NULL NULL NULL NULL NULL
set @@optimizer_use_condition_selectivity=@save_optimizer_use_condition_selectivity,@@optimizer_switch=@save_optimizer_switch;
explain (select * from t1 where a=1) union (select * from t1 where b=1);

4
mysql-test/suite/maria/mrr.result
View File

@ -404,8 +404,8 @@ FROM t1 AS table1, t2 AS table2
WHERE
table1.col_varchar_1024_latin1_key = table2.col_varchar_10_latin1 AND table1.pk<>0 ;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE table2 ALL NULL NULL NULL NULL 2 Using where
1 SIMPLE table1 ref PRIMARY,col_varchar_1024_latin1_key col_varchar_1024_latin1_key 1027 test.table2.col_varchar_10_latin1 2 Using index condition(BKA); Using where; Using join buffer (flat, BKA join); Key-ordered Rowid-ordered scan
1 SIMPLE table2 ALL NULL NULL NULL NULL 2
1 SIMPLE table1 ALL PRIMARY,col_varchar_1024_latin1_key NULL NULL NULL 10 Using where; Using join buffer (flat, BNL join)
SELECT count(*)
FROM t1 AS table1, t2 AS table2
WHERE

51
sql/sql_select.cc
View File

@ -7699,7 +7699,7 @@ void set_position(JOIN *join,uint idx,JOIN_TAB *table,KEYUSE *key)
@param s Current JOIN_TAB
@param with_found_constraint There is a filtering condition on the
current table. See more below
current table of type. See below.
@param use_cond_selectivity Value of optimizer_use_condition_selectivity.
If > 1 then use table->cond_selecitivity.
@ -7713,16 +7713,27 @@ void set_position(JOIN *join,uint idx,JOIN_TAB *table,KEYUSE *key)
- apply the part of WHERE that refers only to this table.
- The result cannot be bigger than table records
'with_found_constraint' is true if the WHERE has a top level expression of
type:
current_table.key_part=expression_that_contains_fields_from_previous_tables
Examples (assuming join order t1,t2):
WHERE t2.keypart1=t1.some_field
WHERE t2.keypart1=t1.some_field+t1.other_field
TODO:
Extend with_found_constraint' to be set for a top level expression of type
X=Y where X and Y has fields from current table and at least one field from
one o more previous tables.
@see also
table_after_join_selectivity() produces selectivity of condition that is
checked after joining rows from this table to rows from preceding tables.
*/
inline
double matching_candidates_in_table(JOIN_TAB *s, bool with_found_constraint,
static double matching_candidates_in_table(JOIN_TAB *s,
bool with_found_constraint,
uint use_cond_selectivity)
{
ha_rows records;
double dbl_records;
if (use_cond_selectivity > 1)
@ -7740,10 +7751,19 @@ double matching_candidates_in_table(JOIN_TAB *s, bool with_found_constraint,
sel <= s->table->opt_range_condition_rows /
table_records);
dbl_records= table_records * sel;
return dbl_records;
}
records = s->found_records;
else
{
/*
This is only taking into considering constant key parts used with
this table!
If no such conditions existed the following should hold:
s->table->opt_range_condition_rows == s->found_rows ==
s->records.
*/
DBUG_ASSERT(s->table->opt_range_condition_rows <= s->found_records);
dbl_records= rows2double(s->table->opt_range_condition_rows);
}
/*
If there is a filtering condition on the table (i.e. ref analyzer found
@ -7754,17 +7774,9 @@ double matching_candidates_in_table(JOIN_TAB *s, bool with_found_constraint,
This heuristic is supposed to force tables used in exprZ to be before
this table in join order.
*/
if (with_found_constraint)
records-= records/4;
/*
If applicable, get a more accurate estimate. Don't use the two
heuristics at once.
*/
if (s->table->opt_range_condition_rows != s->found_records)
records= s->table->opt_range_condition_rows;
dbl_records= (double)records;
dbl_records-= dbl_records/4;
return dbl_records;
}
@ -7988,6 +8000,9 @@ best_access_path(JOIN *join,
{
found_part|= keyuse->keypart_map;
key_parts_dependent= 0;
found_constraint|= (keyuse->used_tables &
~(remaining_tables |
join->const_table_map));
if (!(keyuse->used_tables & ~join->const_table_map))
const_part|= keyuse->keypart_map;
@ -8022,6 +8037,7 @@ best_access_path(JOIN *join,
if (all_parts & 1)
key_dependent|= key_parts_dependent;
found_ref|= best_part_found_ref;
/* Remember if the key expression used previous non const tables */
} while (keyuse->table == table && keyuse->key == key);
/*
@ -8051,7 +8067,6 @@ best_access_path(JOIN *join,
}
else
{
found_constraint= MY_TEST(found_part);
loose_scan_opt.check_ref_access_part1(s, key, start_key, found_part);
/* Check if we found full key */

2
storage/spider/mysql-test/spider/r/direct_left_right_join_nullable.result
View File

@ -87,7 +87,7 @@ NULL NULL NULL 3
connection child2_1;
SELECT argument FROM mysql.general_log WHERE command_type != 'Execute' AND argument LIKE '%select %';
argument
select t0.`a` `a`,t2.`b` `b`,t2.`c` `c`,t3.`a` `a` from `auto_test_remote`.`ta_r_no_idx` t3 left join (`auto_test_remote`.`ta_r_auto_inc` t2 join `auto_test_remote`.`ta_r_3` t1 join `auto_test_remote`.`ta_r` t0) on ((t2.`b` = t3.`b`) and (t2.`c` = t1.`c`) and (t0.`a` = t1.`a`) and (t1.`a` is not null)) where 1 order by t3.`a` desc
select t0.`a` `a`,t2.`b` `b`,t2.`c` `c`,t3.`a` `a` from `auto_test_remote`.`ta_r_no_idx` t3 left join (`auto_test_remote`.`ta_r_auto_inc` t2 join `auto_test_remote`.`ta_r_3` t1 join `auto_test_remote`.`ta_r` t0) on ((t2.`b` = t3.`b`) and (t1.`c` = t2.`c`) and (t0.`a` = t1.`a`) and (t1.`a` is not null)) where 1 order by t3.`a` desc
SELECT argument FROM mysql.general_log WHERE command_type != 'Execute' AND argument LIKE '%select %'
SELECT a, b, date_format(c, '%Y-%m-%d %H:%i:%s') FROM ta_r ORDER BY a;
a b date_format(c, '%Y-%m-%d %H:%i:%s')

2
storage/spider/mysql-test/spider/r/direct_right_left_right_join_nullable.result
View File

@ -87,7 +87,7 @@ NULL c 2000-01-03 00:00:00 3
connection child2_1;
SELECT argument FROM mysql.general_log WHERE command_type != 'Execute' AND argument LIKE '%select %';
argument
select t0.`a` `a`,t2.`b` `b`,t2.`c` `c`,t3.`a` `a` from `auto_test_remote`.`ta_r_no_idx` t3 left join (`auto_test_remote`.`ta_r_auto_inc` t2 join `auto_test_remote`.`ta_r_3` t1 left join `auto_test_remote`.`ta_r` t0 on ((t0.`a` = t1.`a`) and (t1.`a` is not null))) on ((t2.`b` = t3.`b`) and (t2.`c` = t1.`c`)) where 1 order by t3.`a` desc
select t0.`a` `a`,t2.`b` `b`,t2.`c` `c`,t3.`a` `a` from `auto_test_remote`.`ta_r_no_idx` t3 left join (`auto_test_remote`.`ta_r_auto_inc` t2 join `auto_test_remote`.`ta_r_3` t1 left join `auto_test_remote`.`ta_r` t0 on ((t0.`a` = t1.`a`) and (t1.`a` is not null))) on ((t2.`b` = t3.`b`) and (t1.`c` = t2.`c`)) where 1 order by t3.`a` desc
SELECT argument FROM mysql.general_log WHERE command_type != 'Execute' AND argument LIKE '%select %'
SELECT a, b, date_format(c, '%Y-%m-%d %H:%i:%s') FROM ta_r ORDER BY a;
a b date_format(c, '%Y-%m-%d %H:%i:%s')